update go version

.github/workflows/go.yml

@@ -9,10 +9,10 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - name: Set up Go 1.14
+      - name: Set up Go 1.15
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14
+          go-version: 1.15
 
       - name: Check out code
         uses: actions/checkout@v2

.github/workflows/lint.yml

@@ -16,10 +16,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: Set up Go 1.14
+      - name: Set up Go 1.15
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14
+          go-version: 1.15
 
       - name: Check out code
         uses: actions/checkout@v2

.github/workflows/releases.yml

@@ -11,10 +11,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-      - name: Set up Go 1.14
+      - name: Set up Go 1.15
         uses: actions/setup-go@v2
         with:
-          go-version: 1.14
+          go-version: 1.15
       - name: Generate changelog
         run: |
           echo ::set-env name=GORELEASER_CURRENT_TAG::${GITHUB_REF#refs/tags/}