Test against Go 1.14

.github/workflows/go.yml

@@ -4,7 +4,7 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: [1.11.x, 1.12.x, 1.13.x]
+        go-version: [1.11.x, 1.12.x, 1.13.x, 1.14.x]
         platform: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     env:
@@ -39,4 +39,4 @@ jobs:
         go test -race -covermode atomic -coverprofile=profile.cov ./...
         GO111MODULE=off go get github.com/mattn/goveralls
         $(go env GOPATH)/bin/goveralls -coverprofile=profile.cov -service=github
-      if: matrix.go-version == '1.13.x' && matrix.platform == 'ubuntu-latest'
+      if: matrix.go-version == '1.14.x' && matrix.platform == 'ubuntu-latest'