build: Initial linting setup (#1560)

* sets up linting config and runs `yarn lint --fix` once, so that all changes will show up correctly in future PRs.

* Note that there are still a lot of linter errors.

test/broadcastClient.ts

@@ -1,53 +1,52 @@
-import _ from 'lodash'
-import assert from 'assert-diff'
-import setupClient from './setupClient'
-import responses from './fixtures/responses'
-import rippled from './fixtures/rippled'
-import {ignoreWebSocketDisconnect} from './testUtils'
+import assert from "assert-diff";
+import _ from "lodash";
 
-const TIMEOUT = 20000
+import responses from "./fixtures/responses";
+import rippled from "./fixtures/rippled";
+import setupClient from "./setupClient";
+import { ignoreWebSocketDisconnect } from "./testUtils";
+
+const TIMEOUT = 20000;
 
 function checkResult(expected, response) {
   if (expected.txJSON) {
-    assert(response.txJSON)
-    assert.deepEqual(JSON.parse(response.txJSON), JSON.parse(expected.txJSON))
+    assert(response.txJSON);
+    assert.deepEqual(JSON.parse(response.txJSON), JSON.parse(expected.txJSON));
   }
-  assert.deepEqual(_.omit(response, 'txJSON'), _.omit(expected, 'txJSON'))
-  return response
+  assert.deepEqual(_.omit(response, "txJSON"), _.omit(expected, "txJSON"));
+  return response;
 }
 
-describe('BroadcastClient', function () {
-  this.timeout(TIMEOUT)
-  beforeEach(setupClient.setupBroadcast)
-  afterEach(setupClient.teardown)
+describe("BroadcastClient", function () {
+  this.timeout(TIMEOUT);
+  beforeEach(setupClient.setupBroadcast);
+  afterEach(setupClient.teardown);
 
-  it('base', function () {
+  it("base", function () {
     this.mocks.forEach((mock) => {
-      mock.addResponse({command: 'server_info'}, rippled.server_info.normal)
-    })
-    assert(this.client.isConnected())
-    return this.client
-      .request({command: "server_info"})
-      .then(response => {
-        return checkResult(responses.getServerInfo, response.result.info)
-      })
-  })
+      mock.addResponse({ command: "server_info" }, rippled.server_info.normal);
+    });
+    assert(this.client.isConnected());
+    return this.client.request({ command: "server_info" }).then((response) => {
+      return checkResult(responses.getServerInfo, response.result.info);
+    });
+  });
 
-  it('error propagation', function (done) {
-    const data = {error: 'type', error_message: 'info'}
+  it("error propagation", function (done) {
+    const data = { error: "type", error_message: "info" };
     this.mocks.forEach((mock) => {
-      mock.addResponse({command: 'echo'}, data)
-    })
-    this.client.once('error', (type, info) => {
-      assert.strictEqual(type, 'type')
-      assert.strictEqual(info, 'info')
-      done()
-    })
+      mock.addResponse({ command: "echo" }, data);
+    });
+    this.client.once("error", (type, info) => {
+      assert.strictEqual(type, "type");
+      assert.strictEqual(info, "info");
+      done();
+    });
     this.client._clients[1].connection
       .request({
-        command: 'echo',
-        data
+        command: "echo",
+        data,
       })
-      .catch(ignoreWebSocketDisconnect)
-  })
-})
+      .catch(ignoreWebSocketDisconnect);
+  });
+});