chore: tighten ci runs

.github/workflows/ci.yml

@@ -3,9 +3,23 @@ name: CI
 on:
   push:
     branches: [master]
+    paths:
+      - '**.sol'
+      - 'scripts/**.ts'
+      - 'test/**.ts'
+      - 'hardhat.config.ts'
+      - 'package.json'
+      - '.github/workflows/ci.yml'
 
   pull_request:
     branches: [master]
+    paths:
+      - '**.sol'
+      - 'scripts/**.ts'
+      - 'test/**.ts'
+      - 'hardhat.config.ts'
+      - 'package.json'
+      - '.github/workflows/ci.yml'
 
 jobs:
   test: