Add bundlewatch to .travis.yml

GitHub Actions are a bit too problematic, see
#819 (comment)

Remove redundant `npm ci` from `Coding standard check`.
Increase maxSizes of bundles.

.travis.yml

@@ -47,7 +47,12 @@ matrix:
     - name: "Coding standard check"
       php: 7.4
       env: WP_VERSION="${WP_LATEST}" WC_VERSION="${WC_LATEST}" WP_TRAVISCI=cs WP_MULTISITE=0
-      script: npm ci && npm run lint
+      script: npm run lint
+    - name: "Bundle size"
+      php: 7.4
+      env: WP_VERSION="${WP_LATEST}" WC_VERSION="${WC_LATEST}" WP_TRAVISCI=cs WP_MULTISITE=0
+      # We run the production build, to watch also .zip size.
+      script: npm run build && npx bundlewatch
 
 before_install:
   - if [[ "${WP_TRAVISCI}" != "jest" ]]; then composer self-update --1; fi

package.json

@@ -95,25 +95,28 @@
 		"files": [
 			{
 				"path": "./js/build/*.js",
-				"maxSize": "2 kB"
+				"maxSize": "3 kB"
 			},
 			{
 				"path": "./js/build/index.js",
-				"maxSize": "1 mB"
+				"maxSize": "3 mB"
 			},
 			{
 				"path": "./js/build/*.css",
 				"maxSize": "1 kB"
 			},
 			{
 				"path": "./js/build/index.css",
-				"maxSize": "8 kB"
+				"maxSize": "10 kB"
 			},
 			{
 				"path": "./google-listings-and-ads.zip",
 				"maxSize": "12 mB",
 				"compression": "none"
 			}
-		]
+		],
+        "ci": {
+            "trackBranches": ["trunk", "develop"]
+        }
 	}
 }