[ADD] to import microbit (and change a comment)

Author: rikutons

src/lib/ruby-to-blocks-converter/index.js

@@ -17,6 +17,7 @@ import SensingConverter from './sensing';
 import OperatorsConverter from './operators';
 import VariablesConverter from './variables';
 import MyBlocksConverter from './my-blocks';
+import MicroBitConverter from './microbit';
 import MusicConverter from './music';
 import EV3Converter from './ev3';
 

src/lib/ruby-to-blocks-converter/microbit.js

@@ -2,7 +2,7 @@
 import _ from 'lodash';
 
 /**
- * Music converter
+ * MicroBit converter
  */
 const MicroBitConverter = {
 };