Make @0x/contracts-test-utils a dependency instead of a devDependency

contracts/protocol/package.json

@@ -44,7 +44,6 @@
     "homepage": "https://github.com/0xProject/0x-monorepo/contracts/protocol/README.md",
     "devDependencies": {
         "@0x/abi-gen": "^1.0.19",
-        "@0x/contracts-test-utils": "^1.0.2",
         "@0x/dev-utils": "^1.0.21",
         "@0x/sol-compiler": "^1.1.16",
         "@0x/sol-cov": "^2.1.16",
@@ -75,6 +74,7 @@
         "@0x/contracts-interfaces": "^1.0.2",
         "@0x/contracts-libs": "^1.0.2",
         "@0x/contracts-multisig": "^1.0.2",
+        "@0x/contracts-test-utils": "^1.0.2",
         "@0x/contracts-tokens": "^1.0.2",
         "@0x/contracts-utils": "^1.0.2",
         "@0x/order-utils": "^3.0.7",

contracts/protocol/src/index.ts

@@ -1,2 +1,3 @@
 export * from './artifacts';
 export * from './wrappers';
+export * from '../test/utils';

contracts/protocol/test/exchange/order_validator.ts

@@ -18,13 +18,14 @@ import * as _ from 'lodash';
 import {
     artifacts,
     ERC20ProxyContract,
+    ERC20Wrapper,
     ERC721ProxyContract,
+    ERC721Wrapper,
     ExchangeContract,
+    ExchangeWrapper,
     OrderValidatorContract,
 } from '../../src';
 
-import { ERC20Wrapper, ERC721Wrapper, ExchangeWrapper } from '../utils';
-
 chaiSetup.configure();
 const expect = chai.expect;
 const blockchainLifecycle = new BlockchainLifecycle(web3Wrapper);