Updated version of truffle to 5.1.37 to include trufflesuite/truffle#3139

Author: coeniebeyers

package.json

@@ -61,7 +61,7 @@
     "mocha": "5.2.0",
     "nyc": "^14.1.1",
     "solc": "^0.5.10",
-    "truffle": "5.0.31",
+    "truffle": "^5.1.37",
     "truffle-config": "^1.1.18"
   }
 }