#74 update github actions

Author: ienaga

.github/workflows/lint.yml

@@ -22,10 +22,9 @@ jobs:
         with:
           node-version: 24
           registry-url: "https://registry.npmjs.org"
-      - run: npm install -g npm@latest
-      - run: |
-          npm install
-          npx eslint ./src/**/*.ts
+      - run: npm install -D eslint-plugin-unused-imports
+        working-directory: ./template
+      - run: npx eslint ./src/**/*.ts
         working-directory: ./template
 
   windows-browser-test:
@@ -39,8 +38,7 @@ jobs:
         with:
           node-version: 24
           registry-url: "https://registry.npmjs.org"
-      - run: npm install -g npm@latest
-      - run: |
-          npm install
-          npx eslint ./src/**/*.ts
+      - run: npm install -D eslint-plugin-unused-imports
+        working-directory: ./template
+      - run: npx eslint ./src/**/*.ts
         working-directory: ./template