Dual packaging, without breaking existing consumers (#628)

Co-authored-by: Yasumasa Ashida <ys.ashida@gmail.com>

src/bowser.js

@@ -91,3 +91,4 @@ class Bowser {
 }
 
 export default Bowser;
+export const { parse, getParser } = Bowser;

src/parser.js

@@ -210,7 +210,6 @@ class Parser {
     return this.getBrowser().name || '';
   }
 
-
   /**
    * Get browser's version
    * @return {String} version of browser