updates doc

README.md

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 Javascript isomorphic 2D affine transformations written in ES6 syntax. Manipulate transformation matrices with this totally tested library!
 
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 Transformations, i.e. *linear invertible automorphisms*, are used to map a picture into another one with different size, position and orientation. Given a basis, transformations are represented by means of squared invertible matrices, called **transformation matrices**.
 A geometric transformation is defined as a one-to-one mapping of a point space to itself, which preservers some geometric relations of figures. - [Geometric Programming for Computer Aided Design](https://books.google.it/books?vid=ISBN9780471899426)
 

README.template.hbs

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 Javascript isomorphic 2D affine transformations written in ES6 syntax. Manipulate transformation matrices with this totally tested library!
 
 [![chrvadala](https://img.shields.io/badge/website-chrvadala-orange.svg)](https://chrvadala.github.io)
-[![Build Status](https://travis-ci.org/chrvadala/transformation-matrix.svg?branch=master)](https://travis-ci.org/chrvadala/transformation-matrix)
+[![Test](https://github.com/chrvadala/transformation-matrix/workflows/Test/badge.svg)](https://github.com/chrvadala/transformation-matrix/actions)
 [![Coverage Status](https://coveralls.io/repos/github/chrvadala/transformation-matrix/badge.svg?branch=master)](https://coveralls.io/github/chrvadala/transformation-matrix?branch=master)
 [![npm](https://img.shields.io/npm/v/transformation-matrix.svg?maxAge=2592000?style=plastic)](https://www.npmjs.com/package/transformation-matrix)
 [![Downloads](https://img.shields.io/npm/dm/transformation-matrix.svg)](https://www.npmjs.com/package/transformation-matrix)
 [![Donate](https://img.shields.io/badge/donate-PayPal-green.svg)](https://www.paypal.me/chrvadala/25)
 
+
 Transformations, i.e. *linear invertible automorphisms*, are used to map a picture into another one with different size, position and orientation. Given a basis, transformations are represented by means of squared invertible matrices, called **transformation matrices**.
 A geometric transformation is defined as a one-to-one mapping of a point space to itself, which preservers some geometric relations of figures. - [Geometric Programming for Computer Aided Design](https://books.google.it/books?vid=ISBN9780471899426)