2D physics simulations using Chipmunk2D. (#16)

* Basic 2D physics support.

* PolyShape: Code for decomposing arbitrary shapes into convex polygons.

Former-commit-id: 6cdce508f8bb7b6a20833d1e5204b93e7b19707f

.azure/azure-linux-template.yml

@@ -98,6 +98,7 @@ jobs:
           done
           ;;
         *)
+          stack ./examples/counter.hs check
           stack $ARGS test --pedantic
           ;;
       esac

.azure/azure-osx-template.yml

@@ -34,6 +34,7 @@ jobs:
       curl -skL https://get.haskellstack.org/stable/osx-x86_64.tar.gz | tar xz --strip-components=1 --include '*/stack' -C ~/.local/bin;
       export PATH=$HOME/.local/bin:$PATH
       stack --install-ghc $ARGS test --only-dependencies
+      stack ./examples/counter.hs check
       stack $ARGS test --pedantic
     env:
       OS_NAME: ${{ parameters.os }}

.azure/azure-windows-template.yml

@@ -33,6 +33,7 @@ jobs:
       curl -sSkL http://www.stackage.org/stack/windows-x86_64 -o /usr/bin/stack.zip
       unzip -o /usr/bin/stack.zip -d /usr/bin/
       stack --install-ghc $ARGS test --only-dependencies
+      stack ./examples/counter.hs check
       stack $ARGS test --pedantic
     env:
       OS_NAME: ${{ parameters.os }}