Merge branch 'development' into fix/docImprovements

* development: (31 commits)
  Prettier ignore Metacoin artifacts
  Publish
  Updated CHANGELOGS
  Improve deployer error message
  Fix 0x.js tests
  Fix lint issue
  Simply export
  Move NULL_BYTES to @0xproject/utils
  Simplify the tests
  Fix lint error
  Add step to publishing that upload staging doc jsons, deploys staging website, opens every docs page and asks the dev to confirm that each one renders properly before publishing
  Fix web3Wrapper build command
  Add top-level `yarn lerna:stage_docs` to upload docJsons to the staging S3 bucket for all packages with a docs page
  Refactor publish script to have it's main execution body be lean and discrete steps
  Removed unused command
  Remove 0x.js test artifacts
  Fix tslint
  Move migrations into separate monorepo subpackage and hook it up to 0x.js and contracts
  Remove unused var
  Refactor RedundantRpcSubprovider into RedundantSubprovider
  ...

# Conflicts:
#	packages/react-docs/CHANGELOG.json

1 files changed, 2 insertions, 2 deletions

diff --git a/packages/sol-cov/src/coverage_subprovider.ts b/packages/sol-cov/src/coverage_subprovider.ts
index fc8b55188..6504d5a46 100644
--- a/packages/sol-cov/src/coverage_subprovider.ts
+++ b/packages/sol-cov/src/coverage_subprovider.ts
@@ -56,8 +56,8 @@ export class CoverageSubprovider extends Subprovider {
      * @param next Callback to call if this subprovider decides not to handle the request
      * @param end Callback to call if subprovider handled the request and wants to pass back the request.
      */
-    // tslint:disable-next-line:prefer-function-over-method
-    public handleRequest(payload: JSONRPCRequestPayload, next: NextCallback, end: ErrorCallback) {
+    // tslint:disable-next-line:prefer-function-over-method async-suffix
+    public async handleRequest(payload: JSONRPCRequestPayload, next: NextCallback, end: ErrorCallback) {
         switch (payload.method) {
             case 'eth_sendTransaction':
                 const txData = payload.params[0];