Bump eth-json-rpc-middleware dependency (#7128)

* Update eth-json-rpc-middleware to @^4.2.0

* Resolve all eth-json-rpc-middleware to 4.2.0

package.json

@@ -82,6 +82,7 @@
     "eth-ens-namehash": "^2.0.8",
     "eth-json-rpc-filters": "^4.1.0",
     "eth-json-rpc-infura": "^4.0.1",
+    "eth-json-rpc-middleware": "^4.2.0",
     "eth-keyring-controller": "^5.0.1",
     "eth-ledger-bridge-keyring": "^0.2.0",
     "eth-method-registry": "^1.2.0",
@@ -201,7 +202,6 @@
     "eslint-plugin-json": "^1.2.0",
     "eslint-plugin-mocha": "^5.0.0",
     "eslint-plugin-react": "^7.4.0",
-    "eth-json-rpc-middleware": "^4.1.6",
     "fetch-mock": "^6.5.2",
     "file-loader": "^1.1.11",
     "fs-extra": "^6.0.1",

yarn.lock

@@ -8530,10 +8530,10 @@ eth-json-rpc-middleware@^1.5.0:
     promise-to-callback "^1.0.0"
     tape "^4.6.3"
 
-eth-json-rpc-middleware@^4.1.4, eth-json-rpc-middleware@^4.1.5, eth-json-rpc-middleware@^4.1.6:
-  version "4.1.6"
-  resolved "https://registry.yarnpkg.com/eth-json-rpc-middleware/-/eth-json-rpc-middleware-4.1.6.tgz#c625a38888b7697fbb4fcbf06dae17251ac3b76e"
-  integrity sha512-8AdegPz5qmSRKYyFJhVdkM5Uv3L3AOqD8sIctZuQxmyCsUoZDfDwbElpcrAODAA43cei69t64leis016rR690g==
+eth-json-rpc-middleware@^4.1.4, eth-json-rpc-middleware@^4.1.5, eth-json-rpc-middleware@^4.2.0:
+  version "4.2.0"
+  resolved "https://registry.yarnpkg.com/eth-json-rpc-middleware/-/eth-json-rpc-middleware-4.2.0.tgz#cfb77c5056cb8001548c6c7d54f4af5fce04d489"
+  integrity sha512-90LljqRyJhkg7fOwKunh1lu1Mr5bspXMBDitaTGyGPPNiFTbMrhtfbf9fteYlXRFCbq+aIFWwl/X+P7nkrdkLg==
   dependencies:
     btoa "^1.2.1"
     clone "^2.1.1"