fix: Update gulpfile to set image encoding as false (#92)

The EME Logger extension uses gulp to build and package the files, but
the icons are not being encoded properly, leading to the error: "Could
not decode image". The issue is during Chrome Web Store's upload
process, it does not detect this image error, but during the
distribution process, the CWS throws errors, and does not update the
extension.

This is caused from gulp jumping over in this commit:
a643d50

Now, testing this out, the images are encoded properly, and CWS is able
to read it.

Author: gvking

gulpfile.js

@@ -34,7 +34,7 @@ function packageExtension() {
     '*.html',
     '*.js',
     '!gulpfile.js',
-  ], {base: './'});
+  ], {base: './', encoding: false});
 
   return sources
       .pipe(rename((path) => {