Build preparation for release v2.14.0 (#840)

* bump npm version to v2.13.1

* Built new icons, icomoon.json and devicon.css (#839)

Co-authored-by: Thomas-Boi <Thomas-Boi@users.noreply.github.com>

* Add a gulp task to bump npm version

* bump npm version to v2.14.0

* Add code docs to gulp bumpVersion task

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Thomas-Boi <Thomas-Boi@users.noreply.github.com>

Author: Thomas-Boi

devicon-base.css

@@ -5,6 +5,7 @@ const footer = require("gulp-footer");
 const yargs = require("yargs");
 const fsPromise = require("fs").promises;
 const path = require("path");
+const {execSync} = require("child_process")
 
 // global const
 const deviconBaseCSSName = "devicon-base.css"
@@ -191,6 +192,22 @@ function configOptionCallback(file) {
   };
 }
 
+/**
+ * Bump the NPM version of this project. 
+ * This is called via the command line 
+ * using the format "npm run bump -- -v='MAJOR.MINOR.PATCH'"
+ * @returns a Promise.resolve()
+ */
+function bumpVersion() {
+  let newVersion = yargs.argv.v
+  let command = `npm version v${newVersion} -m "bump npm version to v${newVersion}"`
+  console.log("Running command: " + command)
+  let stdout = execSync(command)
+  console.log("Command ran. Here's the result:\n" + stdout)
+  return Promise.resolve()
+}
+
 exports.updateCss = createDeviconMinCSS;
 exports.clean = cleanUp;
 exports.optimizeSvg = optimizeSvg;
+exports.bumpVersion = bumpVersion