Publish @parity/jsonrpc (#4365)

* Add npm/jsonrpc

* Allow ci:build:jsonrpc

* Publish @parity/jsonrpc

js/npm/jsonrpc/README.md

@@ -0,0 +1,5 @@
+# @parity/jsonrpc
+
+JSON and JS interface defintions for RPC calls.
+
+[https://github.com/ethcore/parity/tree/master/js/src/jsonrpc](https://github.com/ethcore/parity/tree/master/js/src/jsonrpc)

js/npm/jsonrpc/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "@parity/jsonrpc",
+  "description": "JSON and JS interface defintions for RPC",
+  "version": "0.0.0",
+  "main": "library.js",
+  "author": "Parity Team <admin@parity.io>",
+  "maintainers": [
+    "Jaco Greeff"
+  ],
+  "contributors": [],
+  "license": "GPL-3.0",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/ethcore/parity.git"
+  },
+  "keywords": [
+    "Ethereum",
+    "ABI",
+    "API",
+    "RPC",
+    "Parity"
+  ],
+  "scripts": {
+  },
+  "devDependencies": {
+  },
+  "dependencies": {
+  }
+}