ci: don't run duplicate tests on pull requests

.github/workflows/lint.yml

@@ -1,31 +0,0 @@
-name: Lint
-
-on: [push, pull_request]
-
-jobs:
-  luacheck:
-    name: Luacheck
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v1
-
-      - name: Prepare
-        run: |
-          sudo apt-get update
-          sudo add-apt-repository universe
-          sudo apt install luarocks -y
-          sudo luarocks install luacheck
-
-      - name: Run Luacheck
-        run: luacheck .
-
-  stylua:
-    name: StyLua
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Stylua
-        uses: JohnnyMorganz/stylua-action@1.0.0
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}
-          args: --check .

.github/workflows/tests.yml

@@ -1,8 +1,39 @@
 name: Run tests
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+  pull_request: ~
 
 jobs:
+  luacheck:
+    name: Luacheck
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Prepare
+        run: |
+          sudo apt-get update
+          sudo add-apt-repository universe
+          sudo apt install luarocks -y
+          sudo luarocks install luacheck
+
+      - name: Run Luacheck
+        run: luacheck .
+
+  stylua:
+    name: StyLua
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Stylua
+        uses: JohnnyMorganz/stylua-action@1.0.0
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --check .
+
   run_tests:
     strategy:
       matrix: