chore(go): switch to golang 1.15

.github/workflows/main.yml

@@ -1,14 +1,18 @@
 name: Go
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request:
 jobs:
   build:
     strategy:
       matrix:
-        go: ["1.13", "1.14"]
+        go: ["1.13", "1.14", "1.15"]
     name: Build with go version ${{ matrix.go }}
     runs-on: ubuntu-latest
     steps:
-      - name: Set up Go 1.14
+      - name: Set up GoLang ${{ matrix.go }}
         uses: actions/setup-go@v1
         with:
           go-version: ${{ matrix.go }}
@@ -20,7 +24,7 @@ jobs:
       - name: Lint
         run: |
           export PATH=$PATH:$(go env GOPATH)/bin
-          curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.18.0
+          curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.30.0
           golangci-lint run ./...
 
       - name: Run tests
@@ -37,7 +41,7 @@ jobs:
           GOOS=windows GOARCH=amd64 CGO_ENABLED=0 go build -o build/go-semantic-release.windows_x86_64.exe  -ldflags "-w -s -X main.version=`./build/go-semantic-release-temp next`" ./cmd/go-semantic-release/
           GOOS=darwin GOARCH=amd64 CGO_ENABLED=0 go build -o build/go-semantic-release.darwin_x86_64  -ldflags "-w -s -X main.version=`./build/go-semantic-release-temp next`" ./cmd/go-semantic-release/
       - name: Build Docker image
-        if: matrix.go == '1.14'
+        if: matrix.go == '1.15'
         run: |
           docker login -u nightapes -p ${{ secrets.DOCKER_PASSWORD }}
           docker login -u nightapes -p ${{ secrets.GITHUB_TOKEN }} docker.pkg.github.com
@@ -46,7 +50,7 @@ jobs:
           docker tag nightapes/go-semantic-release:development-${{matrix.go}} docker.pkg.github.com/nightapes/go-semantic-release/go-semantic-release:development-${{matrix.go}}
           docker push docker.pkg.github.com/nightapes/go-semantic-release/go-semantic-release:development-${{matrix.go}}
       - uses: actions/upload-artifact@v1
-        if: matrix.go == '1.14'
+        if: matrix.go == '1.15'
         with:
           name: build
           path: build