Added missing semicolon in supervisor.js
Added missing semicolon in supervisor.js

I'd propose either adding the semicolon here to the end of line 12, or adding a comment before line 12 which explains the purpose of omitting the semicolon.  If there is a reason, feel free to comment and I'll modify my pull request appropriately.
kediacorporation/node-supervisor,petruisfan/node-supervisor,nishant8BITS/node-supervisor,tempbottle/node-supervisor,isaacs/node-supervisor,Getahun/node-supervisor