Feat: initial permissions to main.yml (#76)

Signed-off-by: Joyce <joycebrumu.u@gmail.com>

Author: joycebrum

.github/workflows/main.yml

@@ -2,6 +2,9 @@ name: tests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 env:
   # Environment variables to support color support (jaraco/skeleton#66):
   # Request colored output from CLI tools supporting it. Different tools
@@ -104,6 +107,8 @@ jobs:
         jobs: ${{ toJSON(needs) }}
 
   release:
+    permissions:
+      contents: write
     needs:
     - check
     if: github.event_name == 'push' && contains(github.ref, 'refs/tags/')