make ethjs-abi a devDependency (#843)

package-lock.json

 {
   "name": "zeppelin-solidity",
-  "version": "1.7.0",
+  "version": "1.8.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2751,6 +2751,7 @@
       "version": "0.2.1",
       "resolved": "https://registry.npmjs.org/ethjs-abi/-/ethjs-abi-0.2.1.tgz",
       "integrity": "sha1-4KepOn6BFjqUR3utVu3lJKtt5TM=",
+      "dev": true,
       "requires": {
         "bn.js": "4.11.6",
         "js-sha3": "0.5.5",
@@ -2760,12 +2761,14 @@
         "bn.js": {
           "version": "4.11.6",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-          "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
+          "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
+          "dev": true
         },
         "js-sha3": {
           "version": "0.5.5",
           "resolved": "https://registry.npmjs.org/js-sha3/-/js-sha3-0.5.5.tgz",
-          "integrity": "sha1-uvDA6MVK1ZA0R9+Wreekobynmko="
+          "integrity": "sha1-uvDA6MVK1ZA0R9+Wreekobynmko=",
+          "dev": true
         }
       }
     },
@@ -4533,7 +4536,8 @@
     "is-hex-prefixed": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/is-hex-prefixed/-/is-hex-prefixed-1.0.0.tgz",
-      "integrity": "sha1-fY035q135dEnFIkTxXPggtd39VQ="
+      "integrity": "sha1-fY035q135dEnFIkTxXPggtd39VQ=",
+      "dev": true
     },
     "is-my-json-valid": {
       "version": "2.16.0",
@@ -5652,6 +5656,7 @@
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/number-to-bn/-/number-to-bn-1.7.0.tgz",
       "integrity": "sha1-uzYjWS9+X54AMLGXe9QaDFP+HqA=",
+      "dev": true,
       "requires": {
         "bn.js": "4.11.6",
         "strip-hex-prefix": "1.0.0"
@@ -5660,7 +5665,8 @@
         "bn.js": {
           "version": "4.11.6",
           "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.11.6.tgz",
-          "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU="
+          "integrity": "sha1-UzRK2xRhehP26N0s4okF0cC6MhU=",
+          "dev": true
         }
       }
     },
@@ -7102,6 +7108,7 @@
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/strip-hex-prefix/-/strip-hex-prefix-1.0.0.tgz",
       "integrity": "sha1-DF8VX+8RUTczd96du1iNoFUA428=",
+      "dev": true,
       "requires": {
         "is-hex-prefixed": "1.0.0"
       }

package.json

@@ -49,6 +49,7 @@
     "eslint-plugin-standard": "^3.0.1",
     "ethereumjs-testrpc": "^6.0.1",
     "ethereumjs-util": "^5.1.2",
+    "ethjs-abi": "^0.2.1",
     "mocha-lcov-reporter": "^1.3.0",
     "solidity-coverage": "^0.4.3",
     "solium": "^1.1.2",
@@ -56,7 +57,6 @@
     "truffle-hdwallet-provider": "0.0.3"
   },
   "dependencies": {
-    "dotenv": "^4.0.0",
-    "ethjs-abi": "^0.2.1"
+    "dotenv": "^4.0.0"
   }
 }