Fix for compression. Use base64 for compatibility

lark/tools/standalone.py

@@ -131,10 +131,10 @@ def gen_standalone(lark_inst, output=None, out=sys.stdout, compress=False):
     def compressed_output(obj):
         s = pickle.dumps(obj, pickle.HIGHEST_PROTOCOL)
         c = zlib.compress(s)
-        output(repr(base64.b85encode(c)))
+        output(repr(base64.b64encode(c)))
 
     def output_decompress(name):
-        output('%(name)s = pickle.loads(zlib.decompress(base64.b85decode(%(name)s)))' % locals())
+        output('%(name)s = pickle.loads(zlib.decompress(base64.b64decode(%(name)s)))' % locals())
 
     output('# The file was automatically generated by Lark v%s' % lark.__version__)
     output('__version__ = "%s"' % lark.__version__)