Meta: Update makem.sh, etc.

.github/workflows/test.yml

@@ -1,7 +1,7 @@
 # * test.yml --- Test Emacs packages using makem.sh on GitHub Actions
 
 # URL: https://github.com/alphapapa/makem.sh
-# Version: 0.2.1
+# Version: 0.3
 
 # * Commentary:
 
@@ -31,8 +31,8 @@ on:
   pull_request:
   push:
     # Comment out this section to enable testing of all branches.
-    # branches:
-    #   - master
+    branches:
+      - master
 
 jobs:
   build:
@@ -63,7 +63,7 @@ jobs:
     - name: Lint
       # NOTE: Uncomment this line to treat lint failures as passing
       #       so the job doesn't show failure.
-      continue-on-error: true
+      # continue-on-error: true
       run: ./makem.sh -vv --sandbox=$SANDBOX_DIR lint
 
     - name: Test