ci(test+lint): Do not test and lint pushes, only PRs

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

.github/workflows/lint.yml

@@ -1,10 +1,6 @@
 name: Lint
 
-on:
-  pull_request:
-  push:
-    branches:
-      - main
+on: pull_request
 
 jobs:
   node:

.github/workflows/npm-test.yml

@@ -1,10 +1,6 @@
 name: Test
 
-on:
-  pull_request:
-  push:
-    branches:
-      - main
+on: pull_request
 
 jobs:
   jest: