UniswapV3 [TKR-4] (#197)

* add balancer v2

* fetch balancer v2 pools from subgraph

* feat: initial stab at a Balancer V2 Sampler WIP

* feat: add sampling for buys and fix build issues WIP [untested]

* fix: BalancerV2Sampler implementation issues, works on Kovan

* chore: BalancerV2 sampling boilerplate

* fix: update Balancer V2 mainnet address

* fix: consolidate differences between the 2 working branches

* fix: use mainnet Balancer V2 subgraph

* fix: stack too deep by minimizing and inline Balancer V2 vault interface

* fix: address review comments and clean up

* fix: sampler vault interface and pools cache assuming a pool has swaps

* address more review comments

* fix: TS type issues and add a comment about deadline argument

* fix: pools_cache_tests incorrect token addresses, prettier incompat

* fix: make ERC20BridgeSampler support BalancerV2 non view sampler fns

* fix: use a struct for passing encoded bridge data for Balancer V2

* chore: add changelog entries

* fix: improve gas accuracy of gas schedule for Balancer V2 & Maker Psm

* fix: don't exclude sources with stale caches & wait for cache refresh

* rebase

* `@0x/asset-swapper`: Fix stack too deep errors in sampler

* `@0x/asset-swapper`: Add uniswap V3 sampler.

* `@0x/contracts-zero-ex`: Add UniswapV3 support to FQT

* `@0x/protocol-utils`: Update BridgeProtocols.
`@0x/asset-swapper`: Add sell integration for UniswapV3.

* `@0x/asset-swapper`: Remove unnecessary swap quote consumer constructor arg.
`@0x/asset-swapper`: Enable UniswapV3 on ropsten.

* `@0x/asset-swapper`: UniswapV3 fixes

* `@0x/asset-swapper`: Fix stuff based on latest deployed testnet contracts

* `@0x/asset-swapper`: Remove UniV3 from mainnet sources for now

* `@0x/asset-swapper`: Tweak univ3 gas schedule

* fix CI?

* `@0x/contracts-test-utils`: Set default ganache gas limit to 100e6

Co-authored-by: xianny <xianny@gmail.com>
Co-authored-by: Kim Persson <kimpersson88@gmail.com>
Co-authored-by: Lawrence Forman <me@merklejerk.com>
Co-authored-by: Jacob Evans <jacob@dekz.net>

contracts/dev-utils/package.json

@@ -41,17 +41,17 @@
     },
     "homepage": "https://github.com/0xProject/protocol/tree/main/contracts/dev-utils",
     "devDependencies": {
-        "@0x/abi-gen": "^5.5.2",
-        "@0x/assert": "^3.0.26",
+        "@0x/abi-gen": "^5.6.0",
+        "@0x/assert": "^3.0.27",
         "@0x/contracts-asset-proxy": "^3.7.10",
         "@0x/contracts-erc20": "^3.3.7",
-        "@0x/contracts-gen": "^2.0.37",
+        "@0x/contracts-gen": "^2.0.38",
         "@0x/contracts-test-utils": "^5.3.25",
-        "@0x/sol-compiler": "^4.7.2",
+        "@0x/sol-compiler": "^4.7.3",
         "@0x/ts-doc-gen": "^0.0.28",
         "@0x/tslint-config": "^4.1.4",
         "@0x/types": "^3.3.3",
-        "@0x/utils": "^6.4.2",
+        "@0x/utils": "^6.4.3",
         "ethereum-types": "^3.5.0",
         "ethers": "~4.0.4",
         "npm-run-all": "^4.1.2",
@@ -63,7 +63,7 @@
         "typescript": "4.2.2"
     },
     "dependencies": {
-        "@0x/base-contract": "^6.3.2",
+        "@0x/base-contract": "^6.4.0",
         "@types/node": "12.12.54"
     },
     "publishConfig": {