Update README.md

Author: mybridge-monthly

README.md

@@ -21,6 +21,7 @@ Also published on [Mybridge Publication](https://medium.mybridge.co)
 * [v.Sep 2018 - Top 10 Open Source Projects](./src/09-2018.md)
 * [v.Oct 2018 - Top 10 Open Source Projects](./src/10-2018.md)
 * [v.Nov 2018 - Top 10 Open Source Projects](./src/11-2018.md)
+* [v.Dec 2018 - Top 10 Open Source Projects](./src/12-2018.md)
 
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