chore(release): 3.0.0 [skip ci]

# [3.0.0](2.1.0...3.0.0) (2021-06-08)

### Features

* **Core Interface:** Update to Version 2 ([9258ecf](9258ecf))

### BREAKING CHANGES

* **Core Interface:** - Package now exports a `defaults` object
- Client.defaults has been removed
- All client config is now stored in `client.config`
- All resources have been removed from the client. Instead retrieve
these from the library and inject the client. E.g.
`client.postcodes.retrieve` becomes `postcodes.retrieve(client, ...)`
- Helper methods (like lookupPostcode, ping) have been removed from the client.
Instead retrieve these from teh library and inject the client. E.g.
`client.lookupPostcode` becomes `lookupPostcode(client, ...)`

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@ideal-postcodes/core-node",
-  "version": "2.1.0",
+  "version": "3.0.0",
   "description": "Node.js client for api.ideal-postcodes.co.uk",
   "author": {
     "name": "Ideal Postcodes",