[TokenVesting] Increase released amount before transfer

contracts/token/TokenVesting.sol

@@ -61,10 +61,10 @@ contract TokenVesting is Ownable {
 
     require(unreleased > 0);
 
-    token.safeTransfer(beneficiary, unreleased);
-
     released[token] = released[token].add(unreleased);
 
+    token.safeTransfer(beneficiary, unreleased);
+
     Released(unreleased);
   }