Merge branch 'development' into feature/portal-ledger-support

* development: (437 commits)
  Publish
  Update yarn.lock
  Update the CHANGELOG
  Fix the bug making it impossible to specify the custom ZRX address
  Fix fill/cancel order by looking for NoError instead of empty blockchainErr given the BlockchainErrs type refactor
  Add a comment about a yarn bug
  Add our mainnet and kovan nodes as backups for Portal requests
  Fix bug hiding the user info from topBar
  Add dev-utils package to top level README
  Prettier newline
  Prettier
  Allow Token symbols to be alphanumeric
  Update CHANGELOG, rebase on development
  Should not -> cannot
  Reject negative amounts in isValidBaseUnitAmount
  Re-add changelog for 0x.js
  Fix prettier
  Update yarn.lock
  Move tests to a separate folder
  Change file layout
  ...

# Conflicts:
#	packages/website/README.md

1 files changed, 13 insertions, 0 deletions

diff --git a/tsconfig.json b/tsconfig.json
new file mode 100644
index 000000000..b6f95e64d
--- /dev/null
+++ b/tsconfig.json
@@ -0,0 +1,13 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es5",
+        "lib": ["es2017", "dom"],
+        "sourceMap": true,
+        "declaration": true,
+        "experimentalDecorators": true,
+        "noImplicitReturns": true,
+        "pretty": true,
+        "strict": true
+    }
+}