Fixed GitHub Actions go versions

Author: eko

.github/workflows/master.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go_version: [ '1.13', '1.14', '1.15', '1.16', '1.17' ]
+        go_version: [ '1.14', '1.15', '1.16', '1.17' ]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v1

.github/workflows/tag.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go_version: [ '1.12', '1.13', '1.14', '1.15' ]
+        go_version: [ '1.14', '1.15', '1.16', '1.17' ]
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2