Remove travis-ci badge. (#3)

* Updates to make BigInt JavaScript support required, dropping ES5 support.

* Clean up package-lock.json.

* Start of converting test suite from tap to mocha/chai.

* Second pass at converting test suite from tap to mocha/chai.

* Complete testing conversion.

* Make sure code works well with proposal-decimal library.

* Remove vestiges of ES5 Unicode support. Make sure error detection testing catches exceptions *not* being thrown.

* Start of EBNF grammar for JSON-Z.

* More work on formal grammar.

* More work on formal grammar.

* Extended types added to formal grammar.

* Clarify whitespace.

* A final (well, I want to believe final!) clean-up pass of the EBNF grammar.

* Add HTML/PNG version of grammar documentation.

* Make sure ${ inside a backtick-quoted string is escaped as $\{. Bold JSON-Z features.

* Fixed build issues, proposal-decimal floating point formatting

* Nomenclature for the two decimal types changed.

* JSONZ.UNDEFINED changes. Partial ESLint updating.

* More ESLint updating.

* ESLint wrapup.

* Fix package.json.

* General code cleanup. Fixed type container spacing.

* Some missed de-linting.

* Minor typographic changes.

* More de-linting before publishing a non-alpha update.

* Add sourcemaps and point package references to minimized code.

* Update coverage reporting.

* Updated CHANGELOG.md.

* Take travis-ci build status out of README.md.

Author: kshetline

README.md

@@ -3,7 +3,6 @@
 [![NPM Stats](https://nodei.co/npm/json-z.svg)](https://npmjs.org/package/json-z/)
 
 [![npm](https://img.shields.io/npm/v/json-z.svg)](https://npmjs.org/package/json-z/)
-[![Build Status](https://travis-ci.com/kshetline/json-z.svg?branch=master)][Build Status]
 [![Coverage Status](https://coveralls.io/repos/github/kshetline/json-z/badge.svg?branch=master)](https://coveralls.io/github/kshetline/json-z?branch=master)
 [![npm downloads](https://img.shields.io/npm/dm/json-z.svg)](https://npmjs.org/package/json-z/)
 [![npm bundle size](https://img.shields.io/bundlephobia/min/json-z.svg)](https://npmjs.org/package/json-z/)