diff --git a/connect4/Cargo.lock b/connect4/Cargo.lock
index 745c62d..9e83e1a 100644
--- a/connect4/Cargo.lock
+++ b/connect4/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "aho-corasick"
 version = "0.7.10"
@@ -77,7 +79,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b1e692897359247cc6bb902933361652380af0f1b7651ae5c5013407f30e109e"
 dependencies = [
  "backtrace-sys",
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "rustc-demangle",
 ]
@@ -243,6 +245,12 @@ version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
 
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
 [[package]]
 name = "cfg-match"
 version = "0.2.1"
@@ -334,7 +342,7 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b8d976903543e0c48546a91908f21588a680a8c8f984df9a5d69feccb2b2a211"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "wasm-bindgen",
 ]
 
@@ -372,7 +380,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "058ed274caafc1f60c4997b5fc07bf7dc7cca454af7c6e81edffe5f33f70dace"
 dependencies = [
  "autocfg",
- "cfg-if",
+ "cfg-if 0.1.10",
  "crossbeam-utils",
  "lazy_static",
  "maybe-uninit",
@@ -386,7 +394,7 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "crossbeam-utils",
 ]
 
@@ -397,7 +405,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c7c73a2d1e9fc0886a08b93e98eb643461230d5f1925e4036204d5f2e261a8"
 dependencies = [
  "autocfg",
- "cfg-if",
+ "cfg-if 0.1.10",
  "lazy_static",
 ]
 
@@ -529,7 +537,7 @@ version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f59efc38004c988e4201d11d263b8171f49a2e7ec0bdbb71773433f271504a5e"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "redox_syscall",
  "winapi 0.3.8",
@@ -688,7 +696,7 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7abc8dd8451921606d809ba32e95b6111925cd2906060d2dcc29c070220503eb"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "wasi",
  "wasm-bindgen",
@@ -1006,7 +1014,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d7043aa5c05dd34fb73b47acb8c3708eac428de4545ea3682ed2f11293ebd890"
 dependencies = [
  "arrayvec 0.4.12",
- "cfg-if",
+ "cfg-if 0.1.10",
  "rustc_version",
  "ryu",
  "static_assertions",
@@ -1039,7 +1047,7 @@ version = "0.4.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "14b6052be84e6b71ab17edffc2eeabf5c2c3ae1fdb464aae35ac50c67a44e1f7"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
 ]
 
 [[package]]
@@ -1128,7 +1136,7 @@ version = "0.6.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "302dec22bcf6bae6dfb69c647187f4b4d0fb6f535521f7bc022430ce8e12008f"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "fuchsia-zircon",
  "fuchsia-zircon-sys",
  "iovec",
@@ -1208,7 +1216,7 @@ version = "0.2.33"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "42550d9fb7b6684a6d404d9fa7250c2eb2646df731d1c06afc06dcee9e1bcf88"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "winapi 0.3.8",
 ]
@@ -1962,13 +1970,12 @@ checksum = "05720e22615919e4734f6a99ceae50d00226c3c5aca406e102ebc33298214e0a"
 
 [[package]]
 name = "socket2"
-version = "0.3.12"
+version = "0.3.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03088793f677dce356f3ccc2edb1b314ad191ab702a5de3faf49304f7e104918"
+checksum = "122e570113d28d773067fab24266b66753f6ea915758651696b6e35e49f88d6e"
 dependencies = [
- "cfg-if",
+ "cfg-if 1.0.0",
  "libc",
- "redox_syscall",
  "winapi 0.3.8",
 ]
 
@@ -2219,7 +2226,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f085d781daf33a804ffd401a41c7d0bbb3506851e7284484802955f3315547c1"
 dependencies = [
  "backtrace",
- "cfg-if",
+ "cfg-if 0.1.10",
  "futures",
  "ipconfig",
  "lazy_static",
@@ -2438,7 +2445,7 @@ version = "0.2.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2cc57ce05287f8376e998cbddfb4c8cb43b84a7ec55cf4551d7c00eef317a47f"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "serde",
  "serde_json",
  "wasm-bindgen-macro",
@@ -2465,7 +2472,7 @@ version = "0.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7add542ea1ac7fdaa9dc25e031a6af33b7d63376292bd24140c637d00d1c312a"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "js-sys",
  "wasm-bindgen",
  "web-sys",
@@ -2570,7 +2577,7 @@ version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dbb3b5a6b2bb17cb6ad44a2e68a43e8d2722c997da10e928665c72ec6c0a0b8e"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "libc",
  "memory_units",
  "winapi 0.3.8",
@@ -2665,7 +2672,7 @@ dependencies = [
  "anyhow",
  "anymap",
  "bincode",
- "cfg-if",
+ "cfg-if 0.1.10",
  "cfg-match",
  "console_error_panic_hook",
  "futures",
@@ -2707,7 +2714,7 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19145953cfaa35cbd26a06ef5f589553d8e16d2a8d889d9c3e74516617ea7db8"
 dependencies = [
- "cfg-if",
+ "cfg-if 0.1.10",
  "cfg-match",
  "gloo",
  "js-sys",