refactor: Enable callback-return rule

eslint/general.js

@@ -4,6 +4,7 @@ module.exports = {
 
     'arrow-body-style': [ 'error', 'as-needed', { requireReturnForObjectLiteral: false }],
     'capitalized-comments': [ 'error', 'always', { ignoreConsecutiveComments: true }],
+    'callback-return': 'error',
     'consistent-this': 'error',
     curly: [ 'error', 'all' ],
     'default-case': 'error',

src/util/SliceStream.ts

@@ -65,8 +65,8 @@ export class SliceStream extends Transform {
       this.binarySlice(chunk as Buffer);
     }
 
-    callback();
     this.source.resume();
+    callback();
   }
 
   protected binarySlice(chunk: Buffer): void {

templates/scripts/util.js

@@ -62,7 +62,7 @@ function addPostListener(callback, formId = 'mainForm', errorId = 'error') {
     event.preventDefault();
 
     try {
-      await callback();
+      return await callback();
     } catch (error) {
       setError(error.message, errorId);
     }