Add explicit permissions to workflows

Author: marijnvanwezel

.github/workflows/analyse.yml

@@ -1,5 +1,8 @@
 name: analyse
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [ 'main' ]

.github/workflows/lint.yml

@@ -1,5 +1,8 @@
 name: lint
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [ 'main' ]

.github/workflows/test.yml

@@ -1,5 +1,8 @@
 name: test
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: ['main']