Merge branch 'v2-prototype' into update-lerna

* v2-prototype: (48 commits)
  Update CHANGELOG
  Rename call data schema id to CallData. Check for TypedArray when hashing data in order-utils crypto
  Fix broken links in sol-cov documentation
  Fix 0x.js ts warnings
  Update yarn.lock
  Fix 0x.js ts warnings
  Fix 0x.js tests on CI
  Fix a bad merge
  Update package versions
  Merge
  Update changelogs
  Add a test for ERC721 Allowance
  Use allowance instead of approval for all in fill-scenarios
  Upgrade sha3 to 1.2.2 to work with node v10
  Check if the token doesn't exist before minting in fill scenarios
  Make downlevelIteration a global config
  Fix tests descriptions
  DRY up the code in order-watcher collision-resistant abi decoder
  Await transactions in fillScenarios
  Rename decodeAssetData to decodeAssetDataOrThrow
  ...

1 files changed, 3 insertions, 0 deletions

diff --git a/packages/order-watcher/tslint.json b/packages/order-watcher/tslint.json
index ffaefe83a..059573ce7 100644
--- a/packages/order-watcher/tslint.json
+++ b/packages/order-watcher/tslint.json
@@ -1,3 +1,6 @@
 {
+    "rules": {
+        "prefer-readonly": true
+    },
     "extends": ["@0xproject/tslint-config"]
 }