wire to specific truffle version

Author: Peter Murray

package.json

@@ -17,10 +17,10 @@
     "ethereumjs-wallet": "^0.6.0",
     "ethjs-query": "^0.3.3",
     "expect": "^22.1.0",
-    "truffle": "^5.0.0-beta.1",
+    "truffle": "5.0.0-beta.1",
     "truffle-wallet-provider": "github:crypedit/truffle-wallet-provider"
   },
   "dependencies": {
     "r2pipe-promise": "^1.4.1"
   }
-}
+}