docs: ✏️ update contribution guidelines

CONTRIBUTING.md

@@ -1,40 +1,4 @@
 # Contributing to `memfs`
 
-To get started, download the project to your machine:
-
-    git clone https://github.com/streamich/memfs
-    cd memfs
-
-Start from the `develop` branch:
-
-    git checkout develop
-    git checkout -b your-feature
-
-Install dependencies:
-
-    npm install
-
-Also, you probably want to use the latest Node.js version and `ts-node`
-to be able to run TypeScript files:
-
-    npm install -g ts-node
-
-While developing your feature you can create a demo file and place it
-in `demo/feature.ts`, run it like this:
-
-    ts-node demo/feature.ts
-
-Don't forget to write unit tests for you feature, test files have `.test.ts`
-extension.
-
-Run tests using this command:
-
-    npm run test-coverage-ts
-
-Also make sure that your test cases cover your new code well.
-
-When done, build the project:
-
-    npm run build
-
-Submit a pull request into the `develop` branch.
+1. Use [Angular convention](https://github.com/angular/angular/blob/master/CONTRIBUTING.md#-commit-message-guidelines) for commit messages.
+2. Add tests for for code you add.

src/volume.ts

@@ -4,14 +4,13 @@ import {Node, Link, File, Stats} from "./node";
 import {Buffer} from 'buffer';
 import setImmediate from './setImmediate';
 import process from './process';
-const extend = require('fast-extend');
-const errors = require('./internal/errors');
 import setTimeoutUnref, {TSetTimeout} from "./setTimeoutUnref";
 import {Readable, Writable} from 'stream';
-const util = require('util');
 import {constants} from "./constants";
 import {EventEmitter} from "events";
-import {ReadStream, WriteStream} from "fs";
+import errors = require('./internal/errors');
+import extend = require('fast-extend');
+import util = require('util');
 
 const {O_RDONLY, O_WRONLY, O_RDWR, O_CREAT, O_EXCL, O_NOCTTY, O_TRUNC, O_APPEND,
     O_DIRECTORY, O_NOATIME, O_NOFOLLOW, O_SYNC, O_DIRECT, O_NONBLOCK,
@@ -1016,7 +1015,7 @@ export class Volume {
             fd = id as number;
         } else {
             const steps = filenameToSteps(id as string);
-            const link: Link = this.getResolvedLink(steps);    
+            const link: Link = this.getResolvedLink(steps);
 
             if(link) {
                 const node = link.getNode();