Replace yarn with npm

Author: lolleko

.github/dependabot.yml

@@ -1,8 +1,8 @@
 version: 2
 updates:
-  - package-ecosystem: "npm"
-    directory: "/"
+  - package-ecosystem: 'npm'
+    directory: '/'
     schedule:
-      interval: "daily"
+      interval: 'daily'
     allow:
-      - dependency-name: "typescript-to-lua"
+      - dependency-name: 'typescript-to-lua'

.github/workflows/ci.yml

@@ -13,6 +13,6 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: 12.13.1
-      - run: yarn --frozen-lockfile
-      - run: yarn build
-      - run: yarn lint
+      - run: npm ci
+      - run: npm run build
+      - run: npm run lint