Remove Coveralls.io tooling

We have not actively posted Coverage data to coveralls.io in several years and retaining the coveralls tooling adds to our maintenance support burden, so this removes it. (If we want to start using it again in the future, they now provide a GitHub Action step, which is probably a better way to do things than with the Grunt plugin we were using.)

This also removes 11 security warnings including 1 that was rated "critical".

Gruntfile.js

@@ -95,9 +95,6 @@ module.exports = function (grunt) {
                 }
             }
         },
-        coveralls: {
-            src: 'coverage/lcov.info'
-        },
         open: {
             jasmine: {
                 path: 'http://127.0.0.1:8000/_SpecRunner.html'
@@ -158,7 +155,6 @@ module.exports = function (grunt) {
     grunt.loadNpmTasks('grunt-contrib-concat');
     grunt.loadNpmTasks('grunt-contrib-uglify');
     grunt.loadNpmTasks('grunt-contrib-jasmine');
-    grunt.loadNpmTasks('grunt-coveralls');
     grunt.loadNpmTasks('grunt-jasmine-node');
     grunt.loadNpmTasks('grunt-contrib-jshint');
     grunt.loadNpmTasks('grunt-contrib-watch');
@@ -182,6 +178,5 @@ module.exports = function (grunt) {
 
     // Default task.
     grunt.registerTask('default', 'test');
-    grunt.registerTask('ci', ['test', 'coveralls']);
 
 };

README.md

@@ -1,5 +1,5 @@
 
-# loglevel [![NPM version][npm-image]][npm-url] [![NPM downloads](https://img.shields.io/npm/dw/loglevel.svg)](https://www.npmjs.com/package/loglevel) [![Build status](https://travis-ci.org/pimterry/loglevel.png)](https://travis-ci.org/pimterry/loglevel) [![Coveralls percentage](https://img.shields.io/coveralls/pimterry/loglevel.svg)](https://coveralls.io/r/pimterry/loglevel?branch=master)
+# loglevel [![NPM version][npm-image]][npm-url] [![NPM downloads](https://img.shields.io/npm/dw/loglevel.svg)](https://www.npmjs.com/package/loglevel) [![Build status](https://travis-ci.org/pimterry/loglevel.png)](https://travis-ci.org/pimterry/loglevel)
 
 [npm-image]: https://img.shields.io/npm/v/loglevel.svg?style=flat
 [npm-url]: https://npmjs.org/package/loglevel

package.json

@@ -31,7 +31,6 @@
     "test-browser": "grunt test-browser",
     "test-node": "grunt test-node",
     "test-types": "tsc --noEmit ./test/type-test.ts",
-    "ci": "grunt ci",
     "dist": "grunt dist",
     "dist-build": "grunt dist-build",
     "watch": "grunt watch"
@@ -49,7 +48,6 @@
     "grunt-contrib-jshint": "^1.1.0",
     "grunt-contrib-uglify": "^3.4.0",
     "grunt-contrib-watch": "^1.1.0",
-    "grunt-coveralls": "^1.0.0",
     "grunt-jasmine-node": "~0.2.1",
     "grunt-open": "~0.2.3",
     "grunt-preprocess": "^5.1.0",