chore: update eslint dependencies

Author: nodkz

.eslintrc

@@ -8,8 +8,7 @@
   ],
   "parserOptions": {
     "sourceType": "module",
-    "useJSXTextNode": true,
-    "project": "./tsconfig.json"
+    "useJSXTextNode": true
   },
   "rules": {
     "no-underscore-dangle": 0,

package.json

@@ -8,11 +8,12 @@
     "@types/jest": "^24.0.19",
     "@types/mongodb": "^3.3.6",
     "@types/node": "^12.11.2",
-    "@typescript-eslint/eslint-plugin": "^1.9.0",
+    "@typescript-eslint/eslint-plugin": "^2.5.0",
+    "@typescript-eslint/parser": "^2.5.0",
     "cross-env": "^6.0.3",
-    "eslint": "^5.15.1",
-    "eslint-config-prettier": "^4.3.0",
-    "eslint-plugin-prettier": "^3.1.0",
+    "eslint": "^6.5.1",
+    "eslint-config-prettier": "^6.4.0",
+    "eslint-plugin-prettier": "^3.1.1",
     "flowgen": "^1.10.0",
     "jest": "^24.9.0",
     "lerna": "^3.18.2",

packages/mongodb-memory-server-core/src/util/MongoInstance.ts

@@ -33,23 +33,17 @@ export default class MongoInstance {
 
   childProcess: ChildProcess | null;
   killerProcess: ChildProcess | null;
-  // @ts-ignore: Need to initialize this function
-  instanceReady: Function;
-  // @ts-ignore: Need to initialize this function
   waitForPrimaryResolveFns: Function[];
-  // @ts-ignore: Need to initialize this function
-  isInstancePrimary: boolean;
-  // @ts-ignore: Need to initialize this function
-  instanceFailed: Function;
-  isInstanceReady: boolean;
+  isInstancePrimary: boolean = false;
+  isInstanceReady: boolean = false;
+  instanceReady: () => void = () => {};
+  instanceFailed: (err: any) => void = () => {};
 
   constructor(opts: MongodOps) {
     this.opts = opts;
-    this.isInstanceReady = false;
     this.childProcess = null;
     this.killerProcess = null;
     this.waitForPrimaryResolveFns = [];
-    this.isInstancePrimary = false;
 
     if (this.opts.debug) {
       if (!this.opts.instance) this.opts.instance = {};