Rename RippleAPI client to Client (#1520)

* rename RippleAPI -> XrplClient

* more renames

* move API stuff to client folder

* rename all api -> client

* fix tests

* make tests run

* fix integ tests

* fix urls

* fix merge issues

* XrplClient -> Client

* fix merge issues

* rename xrpl-client npm symlink to xrpl-local

test/client/constructor/index.ts

@@ -0,0 +1,29 @@
+import assert from 'assert-diff'
+import {TestSuite} from '../../utils'
+import {Client} from 'xrpl-local'
+
+/**
+ * Every test suite exports their tests in the default object.
+ * - Check out the "TestSuite" type for documentation on the interface.
+ * - Check out "test/client/index.ts" for more information about the test runner.
+ */
+export default <TestSuite>{
+  'Client - implicit server port': () => {
+    new Client({server: 'wss://s1.ripple.com'})
+  },
+
+  'Client invalid options': () => {
+    // @ts-ignore - This is intentionally invalid
+    assert.throws(() => new Client({invalid: true}))
+  },
+
+  'Client valid options': () => {
+    const client = new Client({server: 'wss://s:1'})
+    const privateConnectionUrl = (client.connection as any)._url
+    assert.deepEqual(privateConnectionUrl, 'wss://s:1')
+  },
+
+  'Client invalid server uri': () => {
+    assert.throws(() => new Client({server: 'wss//s:1'}))
+  }
+}