Update readfiles.js

Fix Code scanning alert:
- Title: Useless regular-expression character escape
- File: lib/readfiles.js:21
- Description: The escape sequence '\.' is equivalent to just '.', so the sequence may still represent a meta-character when it is used in a regular expression.
- Tool: CodeQL
- Rule ID: js/useless-regexp-character-escape

lib/readfiles.js

@@ -18,7 +18,7 @@ function buildFilter(filters) {
           return '[^\\/]*';
        })
        .replace(/\?/g, '[^\\/]?')
-       .replace(/\*\*/g, '\.*')
+       .replace(/\*\*/g, '.*')
        .replace(/([\-\+\|])/g, '\\$1')
       );
   }
@@ -164,4 +164,4 @@ readfiles.RELATIVE = 0;
 readfiles.FULL_PATH = 1;
 readfiles.FILENAME = 2;
 
-module.exports = readfiles;
+module.exports = readfiles;