Run tests on pull requests

Pull requests will automatically trigger a build and test run. The
produced binaries are stored as artifacts in the Github workflow.

.github/workflows/pre-release.yaml

@@ -1,37 +0,0 @@
----
-name: "pre-release"
-
-on:
-  push:
-    branches:
-      - "master"
-
-
-jobs:
-  pre-release:
-    name: "Pre Release"
-    runs-on: "ubuntu-latest"
-
-    steps:
-    - uses: actions/checkout@v2
-      with:
-        fetch-depth: 0
-
-    - name: Set up Go
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.16
-
-
-    - name: "Build & test"
-      run: "make tools release-artifacts"
-
-    - uses: "marvinpinto/action-automatic-releases@latest"
-      with:
-        repo_token: "${{ secrets.GITHUB_TOKEN }}"
-        automatic_release_tag: "latest"
-        prerelease: true
-        title: "Development Build"
-        files: |
-          LICENSE
-          builds/dist/*