Updates README.me (#289)

* docs: use correct name for prop on validator ctx

* docs(mdlint): apply lint rules

* Fix style

README.md

@@ -1,21 +1,24 @@
-# samlify · 
+# samlify ·
+
 [![Build Status](https://travis-ci.org/tngan/samlify.svg?branch=master)](https://travis-ci.org/tngan/samlify)
 [![npm version](https://img.shields.io/npm/v/samlify.svg?style=flat)](https://www.npmjs.com/package/samlify)
-[![Coverage Status](https://img.shields.io/coveralls/tngan/samlify/master.svg)](https://coveralls.io/github/tngan/samlify?branch=master) 
+[![Coverage Status](https://img.shields.io/coveralls/tngan/samlify/master.svg)](https://coveralls.io/github/tngan/samlify?branch=master)
 [![Join the community on Spectrum](https://withspectrum.github.io/badge/badge.svg)](https://spectrum.chat/samlify)
 
-Highly configuarable Node.js SAML 2.0 library for Single Sign On 
+Highly configuarable Node.js SAML 2.0 library for Single Sign On
 
-### Welcome PRs
+## Welcome PRs
 
 Welcome all PRs for maintaining this project, or provide a link to the repositories especially for use cases alongside with different frameworks.
 
 ### Sponsor
 
 | <img width="50" src="https://user-images.githubusercontent.com/83319/31722733-de95bbde-b3ea-11e7-96bf-4f4e8f915588.png"> | <div style="text-align: left;">If you want to quickly implement SAML SSO, feel free to check out Auth0's NodeJS SDK and free plan at [auth0.com/overview](https://auth0.com/overview?utm_source=GHsponsor&utm_medium=GHsponsor&utm_campaign=samlify&utm_content=auth).</div> |
-|:-------------------------:|:-------------------------|
+| :----------------------------------------------------------------------------------------------------------------------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+
 
 ### Installation
+
 To install the stable version
 
 Starting from v2.6, multiple schema validators are now supported. You can simply set the validator via the following global method. We have four validator modules right now, and you can write your own. The `setSchemaValidator` is required since v2.6, it will throw error if you don't set at the beginning.
@@ -39,7 +42,7 @@ Now you can create your own schema validator and even suppress it but you have t
 
 ```typescript
 samlify.setSchemaValidator({
-  validator: (response: string) => { 
+  validate: (response: string) => {
     /* implment your own or always returns a resolved promise to skip */
     return Promise.resolve('skipped');
   }
@@ -49,21 +52,24 @@ samlify.setSchemaValidator({
 For those using Windows, `windows-build-tools` should be installed globally before installing samlify if you are using `libxml` validator.
 
 ```console
-$ yarn global add windows-build-tools
+yarn global add windows-build-tools
 ```
 
 ### Development
+
 This project is now developed using TypeScript, also support Yarn which is a new package manager.
 
 ```console
-$ yarn global add typescript
-$ yarn
+yarn global add typescript
+yarn
 ```
 
 ### Get Started
+
 ```javascript
 const saml = require('samlify');
 ```
+
 See full documentation [here](https://samlify.js.org/)
 
 ### Example