Merge pull request #801 from feuGeneA/patch-3

in subproviders/package.json, cite typescript-typings only once

packages/subproviders/package.json

@@ -42,7 +42,7 @@
     "dependencies": {
         "@0xproject/assert": "^0.2.12",
         "@0xproject/types": "^0.8.1",
-        "@0xproject/typescript-typings": "^0.4.1",
+        "@0xproject/typescript-typings": "^0.4.2",
         "@0xproject/utils": "^0.7.1",
         "@ledgerhq/hw-app-eth": "^4.3.0",
         "@ledgerhq/hw-transport-u2f": "^4.3.0",
@@ -61,7 +61,6 @@
     "devDependencies": {
         "@0xproject/monorepo-scripts": "^0.2.1",
         "@0xproject/tslint-config": "^0.4.20",
-        "@0xproject/typescript-typings": "^0.4.2",
         "@0xproject/utils": "^0.7.1",
         "@types/bip39": "^2.4.0",
         "@types/bn.js": "^4.11.0",