chore: update deps

No change to logic. This only updates dependencies and adjusts code
style to conform to the new `eslint`.

The update was performed with:

```
nvm use v16 --delete-prefix
npm install -g npm-check-updates
"$(npm config get prefix)/bin/ncu" -u --enginesNode
```

Author: nfischer

package.json

@@ -54,17 +54,17 @@
     "babel-cli": "^6.6.5",
     "babel-preset-env": "^1.7.0",
     "babel-register": "^6.7.2",
-    "concurrently": "^2.1.0",
+    "concurrently": "^5.3.0",
     "eslint": "^5.16.0",
-    "eslint-config-airbnb-base": "^13.1.0",
-    "eslint-plugin-import": "^2.17.3",
+    "eslint-config-airbnb-base": "^14.2.1",
+    "eslint-plugin-import": "^2.26.0",
     "js-yaml": "^3.12.0",
-    "mocha": "^6.1.4",
+    "mocha": "^6.2.3",
     "nyc": "^14.1.1",
     "rimraf": "^2.5.2",
     "shelljs-changelog": "^0.2.6",
     "shelljs-plugin-open": "^0.2.1",
-    "shelljs-release": "^0.5.1",
+    "shelljs-release": "^0.5.2",
     "should": "^13.2.3",
     "watch": "^1.0.2"
   },

src/cli.js

@@ -20,7 +20,7 @@ const run = (input) => {
 if (shouldReadStdin(parsedArgs._)) {
   // Read all stdin first, and then pass that onto ShellJS
   const chunks = [];
-  process.stdin.on('data', data => chunks.push(data));
+  process.stdin.on('data', (data) => chunks.push(data));
   process.stdin.on('end', () => run(chunks.join('')));
 } else {
   // There's no stdin, so we can immediately invoke the ShellJS function

src/help.js

@@ -5,17 +5,17 @@ import { CMD_BLOCKLIST, OPTION_BLOCKLIST } from './config';
 const locallyDefinedOptions = ['version'];
 
 const shxOptions = Object.keys(shell.config)
-  .filter(key => typeof shell.config[key] !== 'function')
-  .filter(key => OPTION_BLOCKLIST.indexOf(key) === -1)
+  .filter((key) => typeof shell.config[key] !== 'function')
+  .filter((key) => OPTION_BLOCKLIST.indexOf(key) === -1)
   .concat(locallyDefinedOptions)
-  .map(key => `    * --${key}`);
+  .map((key) => `    * --${key}`);
 
 export default () => {
   // Note: compute this at runtime so that we have all plugins loaded.
   const commandList = Object.keys(shell)
-    .filter(cmd => typeof shell[cmd] === 'function')
-    .filter(cmd => CMD_BLOCKLIST.indexOf(cmd) === -1)
-    .map(cmd => `    * ${cmd}`);
+    .filter((cmd) => typeof shell[cmd] === 'function')
+    .filter((cmd) => CMD_BLOCKLIST.indexOf(cmd) === -1)
+    .map((cmd) => `    * ${cmd}`);
 
   return `
 shx: A wrapper for shelljs UNIX commands.