chore: Run lint

Author: gonfunko

packages/blockly/tests/browser/.mocharc.js

@@ -3,5 +3,5 @@
 module.exports = {
   ui: 'tdd',
   require: __dirname + '/test/hooks.mjs',
-  spec: 'tests/browser/test/**/*_test.mjs'
+  spec: 'tests/browser/test/**/*_test.mjs',
 };