Open file for parsing with UTF-8 support (#262)

Co-authored-by: Haroon Sheikh <haroon.sheikh@outlook.com>

getgauge/parser.py

@@ -13,7 +13,7 @@ def parse(file_path, content=None):
         """
         try:
             if content is None:
-                with open(file_path) as f:
+                with open(file_path, encoding='utf-8') as f:
                     content = f.read()
             py_tree = RedBaron(content)
             return Parser(file_path, py_tree)