test against modified create-ecdh

Author: calvinmetcalf

package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "browserify-cipher": "^1.0.0",
     "browserify-sign": "^3.0.1",
-    "create-ecdh": "^2.0.0",
+    "create-ecdh": "crypto-browserify/create-ecdh#browser-field",
     "create-hash": "^1.1.0",
     "create-hmac": "^1.1.0",
     "diffie-hellman": "^3.0.1",
@@ -30,7 +30,6 @@
     "randombytes": "^2.0.0"
   },
   "devDependencies": {
-    "browserify": "^11.2.0",
     "hash-test-vectors": "~1.3.2",
     "standard": "^5.0.2",
     "tape": "~2.3.2",