ci: also trigger on master branch

Author: gjasny

.github/workflows/bazel-ci.yml

@@ -1,5 +1,9 @@
 name: Bazel CI
-on: [pull_request]
+on:
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   build:

.github/workflows/cmake-ci.yml

@@ -1,5 +1,9 @@
 name: CMake CI
-on: [pull_request]
+on:
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   build:

.github/workflows/coverage.yml

@@ -1,5 +1,9 @@
 name: Coverage
-on: [pull_request]
+on:
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   build:

.github/workflows/linting.yml

@@ -1,5 +1,9 @@
 name: Linting
-on: [pull_request]
+on:
+  pull_request:
+  push:
+    branches:
+      - master
 
 jobs:
   iwyu: