switch @0x/contract-wrappers to generated wrappers (#2037)

* switch @0x/contract-wrappers to generated wrappers

- remove TransactionEncoder
- move TokenUtils to @0x/dev-utils
- detailed changes in #2040

packages/0x.js/package.json

@@ -76,7 +76,7 @@
         "@0x/assert": "^2.1.2",
         "@0x/asset-swapper": "^1.0.0",
         "@0x/base-contract": "^5.3.0",
-        "@0x/contract-wrappers": "^10.1.0",
+        "@0x/contract-wrappers": "10.1.0",
         "@0x/order-utils": "^8.2.4",
         "@0x/order-watcher": "^4.0.16",
         "@0x/subproviders": "^5.0.0",

packages/0x.js/src/index.ts

@@ -40,6 +40,13 @@ export {
 } from '@0x/contract-wrappers';
 
 export {
+    DutchAuctionContract,
+    ERC20ProxyContract,
+    ERC721ProxyContract,
+    ExchangeContract,
+    ForwarderContract,
+    OrderValidatorContract,
+    WETH9Contract,
     WETH9Events,
     WETH9WithdrawalEventArgs,
     WETH9ApprovalEventArgs,
@@ -102,15 +109,12 @@ export {
     ObjectMap,
     OrderRelevantState,
     Stats,
-    DutchAuctionDetails,
     ZeroExTransaction,
     SignedZeroExTransaction,
 } from '@0x/types';
 
 export {
-    BlockParamLiteral,
     ContractAbi,
-    BlockParam,
     LogWithDecodedArgs,
     ContractEventArg,
     SupportedProvider,