docs(version): show version in footer

Author: Ryan A. Johnson

docs/_templates/partials/footer_nav.njk

@@ -8,4 +8,6 @@
       {{ page.updated.format(site.dateFormat) }}
     </small>
   {% endif %}
+
+  <small>(v{{VERSION}})</small>
 </div>

lib/context.js

@@ -1,13 +1,14 @@
 'use strict';
 
 const CONFIG = require('../_config');
+const JSON5 = require('json5');
+const PKG = require('../package.json');
 const _ = require('lodash');
 const fm = require('front-matter');
 const fs = require('fs');
 const globby = require('globby');
 const moment = require('moment');
 const path = require('path');
-const JSON5 = require('json5');
 
 // Fetch data from {CONFIG.docsDir}/_data
 function _getDataContext () {
@@ -66,6 +67,7 @@ function forFile (relPath) {
         site: CONFIG.site,
         data: _getDataContext(),
         page: _getPageContext(relPath),
+        VERSION: PKG.version,
     };
 }//forFile