diff --git a/package.json b/package.json
index 204aa46..8bb78c3 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "@babel/core": "7.5.5",
     "@babel/node": "7.5.5",
-    "@babel/plugin-proposal-class-properties": "7.4.4",
+    "@babel/plugin-proposal-class-properties": "7.7.0",
     "@babel/plugin-transform-runtime": "7.5.5",
     "@babel/preset-env": "7.5.5",
     "babel-eslint": "10.0.2",
diff --git a/yarn.lock b/yarn.lock
index 0c3ab98..d92d9b9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -57,6 +57,16 @@
     source-map "^0.5.0"
     trim-right "^1.0.1"
 
+"@babel/generator@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.7.0.tgz#c6d4d1f7a0d6e139cbd01aca73170b0bff5425b4"
+  integrity sha512-1wdJ6UxHyL1XoJQ119JmvuRX27LRih7iYStMPZOWAjQqeAabFg3dYXKMpgihma+to+0ADsTVVt6oRyUxWZw6Mw==
+  dependencies:
+    "@babel/types" "^7.7.0"
+    jsesc "^2.5.1"
+    lodash "^4.17.13"
+    source-map "^0.5.0"
+
 "@babel/helper-annotate-as-pure@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz#323d39dd0b50e10c7c06ca7d7638e6864d8c5c32"
@@ -78,16 +88,17 @@
     "@babel/traverse" "^7.4.4"
     "@babel/types" "^7.4.4"
 
-"@babel/helper-create-class-features-plugin@^7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.4.4.tgz#fc3d690af6554cc9efc607364a82d48f58736dba"
+"@babel/helper-create-class-features-plugin@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.7.0.tgz#bcdc223abbfdd386f94196ae2544987f8df775e8"
+  integrity sha512-MZiB5qvTWoyiFOgootmRSDV1udjIqJW/8lmxgzKq6oDqxdmHUjeP2ZUOmgHdYjmUVNABqRrHjYAYRvj8Eox/UA==
   dependencies:
-    "@babel/helper-function-name" "^7.1.0"
-    "@babel/helper-member-expression-to-functions" "^7.0.0"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
+    "@babel/helper-function-name" "^7.7.0"
+    "@babel/helper-member-expression-to-functions" "^7.7.0"
+    "@babel/helper-optimise-call-expression" "^7.7.0"
     "@babel/helper-plugin-utils" "^7.0.0"
-    "@babel/helper-replace-supers" "^7.4.4"
-    "@babel/helper-split-export-declaration" "^7.4.4"
+    "@babel/helper-replace-supers" "^7.7.0"
+    "@babel/helper-split-export-declaration" "^7.7.0"
 
 "@babel/helper-define-map@^7.5.5":
   version "7.5.5"
@@ -113,24 +124,34 @@
     "@babel/template" "^7.1.0"
     "@babel/types" "^7.0.0"
 
+"@babel/helper-function-name@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.7.0.tgz#44a5ad151cfff8ed2599c91682dda2ec2c8430a3"
+  integrity sha512-tDsJgMUAP00Ugv8O2aGEua5I2apkaQO7lBGUq1ocwN3G23JE5Dcq0uh3GvFTChPa4b40AWiAsLvCZOA2rdnQ7Q==
+  dependencies:
+    "@babel/helper-get-function-arity" "^7.7.0"
+    "@babel/template" "^7.7.0"
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-get-function-arity@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.0.0.tgz#83572d4320e2a4657263734113c42868b64e49c3"
   dependencies:
     "@babel/types" "^7.0.0"
 
+"@babel/helper-get-function-arity@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-get-function-arity/-/helper-get-function-arity-7.7.0.tgz#c604886bc97287a1d1398092bc666bc3d7d7aa2d"
+  integrity sha512-tLdojOTz4vWcEnHWHCuPN5P85JLZWbm5Fx5ZsMEMPhF3Uoe3O7awrbM2nQ04bDOUToH/2tH/ezKEOR8zEYzqyw==
+  dependencies:
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-hoist-variables@^7.4.4":
   version "7.4.4"
   resolved "https://registry.yarnpkg.com/@babel/helper-hoist-variables/-/helper-hoist-variables-7.4.4.tgz#0298b5f25c8c09c53102d52ac4a98f773eb2850a"
   dependencies:
     "@babel/types" "^7.4.4"
 
-"@babel/helper-member-expression-to-functions@^7.0.0":
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.0.0.tgz#8cd14b0a0df7ff00f009e7d7a436945f47c7a16f"
-  dependencies:
-    "@babel/types" "^7.0.0"
-
 "@babel/helper-member-expression-to-functions@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.5.5.tgz#1fb5b8ec4453a93c439ee9fe3aeea4a84b76b590"
@@ -138,6 +159,13 @@
   dependencies:
     "@babel/types" "^7.5.5"
 
+"@babel/helper-member-expression-to-functions@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.7.0.tgz#472b93003a57071f95a541ea6c2b098398bcad8a"
+  integrity sha512-QaCZLO2RtBcmvO/ekOLp8p7R5X2JriKRizeDpm5ChATAFWrrYDcDxPuCIBXKyBjY+i1vYSdcUTMIb8psfxHDPA==
+  dependencies:
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-module-imports@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.0.0.tgz#96081b7111e486da4d2cd971ad1a4fe216cc2e3d"
@@ -172,6 +200,13 @@
   dependencies:
     "@babel/types" "^7.0.0"
 
+"@babel/helper-optimise-call-expression@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.7.0.tgz#4f66a216116a66164135dc618c5d8b7a959f9365"
+  integrity sha512-48TeqmbazjNU/65niiiJIJRc5JozB8acui1OS7bSd6PgxfuovWsvjfWSzlgx+gPFdVveNzUdpdIg5l56Pl5jqg==
+  dependencies:
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-plugin-utils@^7.0.0":
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0.tgz#bbb3fbee98661c569034237cc03967ba99b4f250"
@@ -198,15 +233,6 @@
     "@babel/traverse" "^7.1.0"
     "@babel/types" "^7.0.0"
 
-"@babel/helper-replace-supers@^7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.4.4.tgz#aee41783ebe4f2d3ab3ae775e1cc6f1a90cefa27"
-  dependencies:
-    "@babel/helper-member-expression-to-functions" "^7.0.0"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
-    "@babel/traverse" "^7.4.4"
-    "@babel/types" "^7.4.4"
-
 "@babel/helper-replace-supers@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.5.5.tgz#f84ce43df031222d2bad068d2626cb5799c34bc2"
@@ -217,6 +243,16 @@
     "@babel/traverse" "^7.5.5"
     "@babel/types" "^7.5.5"
 
+"@babel/helper-replace-supers@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-replace-supers/-/helper-replace-supers-7.7.0.tgz#d5365c8667fe7cbd13b8ddddceb9bd7f2b387512"
+  integrity sha512-5ALYEul5V8xNdxEeWvRsBzLMxQksT7MaStpxjJf9KsnLxpAKBtfw5NeMKZJSYDa0lKdOcy0g+JT/f5mPSulUgg==
+  dependencies:
+    "@babel/helper-member-expression-to-functions" "^7.7.0"
+    "@babel/helper-optimise-call-expression" "^7.7.0"
+    "@babel/traverse" "^7.7.0"
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-simple-access@^7.1.0":
   version "7.1.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-simple-access/-/helper-simple-access-7.1.0.tgz#65eeb954c8c245beaa4e859da6188f39d71e585c"
@@ -236,6 +272,13 @@
   dependencies:
     "@babel/types" "^7.4.4"
 
+"@babel/helper-split-export-declaration@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/helper-split-export-declaration/-/helper-split-export-declaration-7.7.0.tgz#1365e74ea6c614deeb56ebffabd71006a0eb2300"
+  integrity sha512-HgYSI8rH08neWlAH3CcdkFg9qX9YsZysZI5GD8LjhQib/mM0jGOZOVkoUiiV2Hu978fRtjtsGsW6w0pKHUWtqA==
+  dependencies:
+    "@babel/types" "^7.7.0"
+
 "@babel/helper-wrap-function@^7.1.0":
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/@babel/helper-wrap-function/-/helper-wrap-function-7.2.0.tgz#c4e0012445769e2815b55296ead43a958549f6fa"
@@ -279,6 +322,11 @@
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.5.5.tgz#02f077ac8817d3df4a832ef59de67565e71cca4b"
   integrity sha512-E5BN68cqR7dhKan1SfqgPGhQ178bkVKpXTPEXnFJBrEt8/DKRZlybmy+IgYLTeN7tp1R5Ccmbm2rBk17sHYU3g==
 
+"@babel/parser@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.7.0.tgz#232618f6e8947bc54b407fa1f1c91a22758e7159"
+  integrity sha512-GqL+Z0d7B7ADlQBMXlJgvXEbtt5qlqd1YQ5fr12hTSfh7O/vgrEIvJxU2e7aSVrEUn75zTZ6Nd0s8tthrlZnrQ==
+
 "@babel/plugin-proposal-async-generator-functions@^7.2.0":
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-async-generator-functions/-/plugin-proposal-async-generator-functions-7.2.0.tgz#b289b306669dce4ad20b0252889a15768c9d417e"
@@ -287,11 +335,12 @@
     "@babel/helper-remap-async-to-generator" "^7.1.0"
     "@babel/plugin-syntax-async-generators" "^7.2.0"
 
-"@babel/plugin-proposal-class-properties@7.4.4":
-  version "7.4.4"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.4.4.tgz#93a6486eed86d53452ab9bab35e368e9461198ce"
+"@babel/plugin-proposal-class-properties@7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.7.0.tgz#ac54e728ecf81d90e8f4d2a9c05a890457107917"
+  integrity sha512-tufDcFA1Vj+eWvwHN+jvMN6QsV5o+vUlytNKrbMiCeDL0F2j92RURzUsUMWE5EJkLyWxjdUslCsMQa9FWth16A==
   dependencies:
-    "@babel/helper-create-class-features-plugin" "^7.4.4"
+    "@babel/helper-create-class-features-plugin" "^7.7.0"
     "@babel/helper-plugin-utils" "^7.0.0"
 
 "@babel/plugin-proposal-dynamic-import@^7.5.0":
@@ -689,6 +738,15 @@
     "@babel/parser" "^7.4.4"
     "@babel/types" "^7.4.4"
 
+"@babel/template@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/template/-/template-7.7.0.tgz#4fadc1b8e734d97f56de39c77de76f2562e597d0"
+  integrity sha512-OKcwSYOW1mhWbnTBgQY5lvg1Fxg+VyfQGjcBduZFljfc044J5iDlnDSfhQ867O17XHiSCxYHUxHg2b7ryitbUQ==
+  dependencies:
+    "@babel/code-frame" "^7.0.0"
+    "@babel/parser" "^7.7.0"
+    "@babel/types" "^7.7.0"
+
 "@babel/traverse@^7.0.0", "@babel/traverse@^7.1.0", "@babel/traverse@^7.4.4", "@babel/traverse@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.5.5.tgz#f664f8f368ed32988cd648da9f72d5ca70f165bb"
@@ -704,6 +762,21 @@
     globals "^11.1.0"
     lodash "^4.17.13"
 
+"@babel/traverse@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/traverse/-/traverse-7.7.0.tgz#9f5744346b8d10097fd2ec2eeffcaf19813cbfaf"
+  integrity sha512-ea/3wRZc//e/uwCpuBX2itrhI0U9l7+FsrKWyKGNyvWbuMcCG7ATKY2VI4wlg2b2TA39HHwIxnvmXvtiKsyn7w==
+  dependencies:
+    "@babel/code-frame" "^7.5.5"
+    "@babel/generator" "^7.7.0"
+    "@babel/helper-function-name" "^7.7.0"
+    "@babel/helper-split-export-declaration" "^7.7.0"
+    "@babel/parser" "^7.7.0"
+    "@babel/types" "^7.7.0"
+    debug "^4.1.0"
+    globals "^11.1.0"
+    lodash "^4.17.13"
+
 "@babel/types@^7.0.0", "@babel/types@^7.2.0", "@babel/types@^7.2.2", "@babel/types@^7.4.4", "@babel/types@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.5.5.tgz#97b9f728e182785909aa4ab56264f090a028d18a"
@@ -713,6 +786,15 @@
     lodash "^4.17.13"
     to-fast-properties "^2.0.0"
 
+"@babel/types@^7.7.0":
+  version "7.7.0"
+  resolved "https://registry.yarnpkg.com/@babel/types/-/types-7.7.0.tgz#bdf5967277ced7590da452c31d60853d0beb5d4f"
+  integrity sha512-ptM1jeXPYi3BfRBelzbTgL/7aP99oYJCbLtGha8phqRY3EeXch+i6LuxRcNQAIgL++yyNPR/rO6cGLDc0cvUMQ==
+  dependencies:
+    esutils "^2.0.2"
+    lodash "^4.17.13"
+    to-fast-properties "^2.0.0"
+
 "@samverschueren/stream-to-observable@^0.3.0":
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/@samverschueren/stream-to-observable/-/stream-to-observable-0.3.0.tgz#ecdf48d532c58ea477acfcab80348424f8d0662f"