Please make it build with stack and Stackage

[tomjaguarpaw]

This package is currently rather hard to build because it is not compatible with any Stackage Long Term Support release. Please could you tweak the bounds so that it does? The following seemed to work (and you'll need to do it for TypeNat and diplomacy too)

-  build-depends:       base >=4.7 && <4.8
+  build-depends:       base >=4.7 && <4.9
                      , async >=2.0 && <2.1
                      , stm >=2.4 && <2.5
-                     , transformers >=0.3 && <0.4
+                     , transformers >=0.3 && <0.5
                      , containers >=0.5 && <0.6
                      , diplomacy >=0.1 && <0.2
                      , TypeNat >=0.4 && <0.5
@@ -42,18 +42,18 @@ executable diplomacy-server
                      , rest-core >=0.36 && <0.37
                      , rest-wai >=0.1 && <0.2
                      , wai >=3.0 && <3.1
-                     , warp >=3.0 && <3.1
-                     , warp-tls >=3.0 && <3.1
+                     , warp >=3.0 && <3.2
+                     , warp-tls >=3.0 && <3.2
                      , optparse-applicative >=0.11 && <0.12
                      , transformers-compat >=0.4 && <0.5
                      , bytestring >=0.10 && <0.11
-                     , aeson >=0.9 && <0.10
+                     , aeson >=0.8 && <0.10
                      , json-schema >=0.7 && <0.8
-                     , mtl >=2.1 && <2.2
+                     , mtl >=2.1 && <2.3
                      , Stream >=0.4 && <0.5
-                     , deepseq >=1.3 && <1.4
+                     , deepseq >=1.3 && <1.5
                      , text >=1.2 && <1.3
-                     , filepath >=1.3 && <1.4
+                     , filepath >=1.3 && <1.5