Put version and description in usage output

bin/jack.js

@@ -24,10 +24,14 @@ const nycReporters = [
   'text-summary',
 ]
 
+const pkg = require('../package.json')
+
 module.exports = main => jack({
   main,
   usage: 'tap [options] [<files>]',
   help:`
+${pkg.name} v${pkg.version} - ${pkg.description}
+
 Executes all the files and interprets their output as TAP
 formatted test result data.  If no files are specified, then
 tap will search for testy-looking files, and run those.

docs/cli/index.md

@@ -11,6 +11,8 @@ You can get help on tap's command line interface by running `tap -h`.
 Usage:
   tap [options] [<files>]
 
+tap v14.1.1 - A Test-Anything-Protocol library for JavaScript
+
 Executes all the files and interprets their output as TAP formatted test result
 data. If no files are specified, then tap will search for testy-looking files,
 and run those. (See '--test-regex' below.)
@@ -450,4 +452,5 @@ Config Files:
 
   Run 'tap --dump-config' for a listing of what can be set in that file. Each of
   the keys corresponds to one of the options above.
+
 ```

package.json

@@ -2,8 +2,8 @@
   "name": "tap",
   "version": "14.1.1",
   "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me)",
-  "description": "A Test-Anything-Protocol library",
-  "homepage": "http://node-tap.org/",
+  "description": "A Test-Anything-Protocol library for JavaScript",
+  "homepage": "http://www.node-tap.org/",
   "bin": {
     "tap": "bin/run.js"
   },