chore: Replace coveralls with codecov

Author: prantlf

.coveralls.yml

@@ -1,4 +1,3 @@
-.coveralls.yml
 .editorconfig
 .eslintignore
 .eslintrc.yml

.npmignore

@@ -1,25 +1,15 @@
-sudo: false
 language: node_js
 cache:
   directories:
     - ~/.npm
 notifications:
   email: false
 node_js:
-  - '12'
-  - '10'
-  - '8'
-  - '6'
-  - '4'
-script:
-  - npm run prepare
-  - if [ `node --version | cut -c 2` -ne 4 ]; then
-      npm test;
-    else
-      npm run test:old;
-    fi
+  - node
+  - lts/*
+  - 8
 after_success:
-  - test `node --version | cut -c 2,3` -eq 10 && npm run coverage
+  - npx codecov
   - npx semantic-release
 branches:
   except:

.travis.yml

@@ -2,7 +2,7 @@
 
 [![NPM version](https://badge.fury.io/js/%40prantlf%2Fjsonlint.svg)](https://badge.fury.io/js/%40prantlf%2Fjsonlint)
 [![Build Status](https://travis-ci.com/prantlf/jsonlint.svg?branch=master)](https://travis-ci.com/prantlf/jsonlint)
-[![Coverage Status](https://coveralls.io/repos/github/prantlf/jsonlint/badge.svg?branch=master)](https://coveralls.io/github/prantlf/jsonlint?branch=master)
+[![codecov](https://codecov.io/gh/prantlf/jsonlint/branch/master/graph/badge.svg)](https://codecov.io/gh/prantlf/jsonlint)
 [![Dependency Status](https://david-dm.org/prantlf/jsonlint.svg)](https://david-dm.org/prantlf/jsonlint)
 [![devDependency Status](https://david-dm.org/prantlf/jsonlint/dev-status.svg)](https://david-dm.org/prantlf/jsonlint#info=devDependencies)
 [![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)