Split push vs. pull_request lint tooling (#108)

.github/workflows/reviewdog.yml

@@ -0,0 +1,16 @@
+name: Reviewdog
+on: [pull_request]
+jobs:
+  vint:
+    strategy:
+      fail-fast: false
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Lint Vimscript in PR changes
+      uses: reviewdog/action-vint@v1
+      with:
+        github_token: ${{ secrets.github_token }}
+        reporter: github-pr-review
+        level: info

.github/workflows/vint.yml

@@ -1,16 +1,16 @@
 name: Vint
-on: [push, pull_request]
+on: [push]
 jobs:
   vint:
+    strategy:
+      fail-fast: false
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@master
+      uses: actions/checkout@v2
     - name: Set up Python
-      uses: actions/setup-python@v1
-      with:
-        python-version: 3.7
+      uses: actions/setup-python@v2
     - name: Setup dependencies
       run: pip install vim-vint
-    - name: Run Vimscript Linter
+    - name: Lint Vimscript
       run: vint .