chore(ci): migrate to github actions

Author: Simon Prochazka

.drone.yml

@@ -0,0 +1,12 @@
+name: Linters
+
+on: [pull_request]
+
+jobs:
+  validate-commits:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+      - name: Commitsar check
+        uses: docker://outillage/commitsar

.github/workflows/linters.yml

@@ -0,0 +1,17 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+      - name: Release Notary
+        uses: docker://outillage/release-notary
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/release.yml

@@ -0,0 +1,21 @@
+name: Test
+
+on: [pull_request]
+
+jobs:
+  go:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        go-version: [1.12.x, 1.13.x]
+
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v1
+      - name: Test
+        run: make ci