add reviewdog vint github actions (#608)

add reviewdog and vint support

.github/workflows/reviewdog.yml

@@ -0,0 +1,13 @@
+name: reviewdog
+on: [pull_request, push]
+jobs:
+  vimlint:
+    name: runner / vint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: vint
+        uses: reviewdog/action-vint@v1
+        with:
+          github_token: ${{ secrets.github_token }}
+          level: warning

.vintrc.yaml

@@ -0,0 +1,10 @@
+cmdargs:
+  severity: style_problem
+
+policies:
+  ProhibitUnusedVariable:
+    enabled: true
+  ProhibitImplicitScopeVariable:
+    enabled: true
+  ProhibitNoAbortFunction:
+    enabled: true