Merge pull request #83 from Luzilla/chore-reduce-runs-on

Chore: reduce builds

Author: till

.github/workflows/pr.yml

@@ -8,8 +8,7 @@ jobs:
     strategy:
       matrix:
         go-version: [1.14.x, 1.15.x, 1.16.x]
-        os: [ubuntu-latest, macos-latest, windows-latest]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Setup Go
       uses: actions/setup-go@v2