gh-pages now builds successfully

This addresses one half of #183. We needed to both (1) be able to
generate the gh-pages branch again and (2) be able to map eyeglass.rocks
to the new `A` record from github. When attempting a rebuild with node
v8 and v10, the following problems were discovered:

* `gulp-gh-pages` uses an outdated version of `gift`
* `eyeglass-dev-site-builder` needs updated `eyeglass` & `node-sass`

This was fixed by changing the dependency on `gulp-gh-pages` to the
community module `gulp-gh-pages-will`. To fix the eyeglass dependency,
the values in `package-lock.json` were manually increased to a version
of `eyeglass` and `node-sass` that do not run into an Abort Trap on OSX.

.node-version

@@ -0,0 +1 @@
+8.11.3

build/site.js

@@ -1,7 +1,10 @@
 "use strict";
 
 var SiteBuilder = require("eyeglass-dev-site-builder");
-var ghPages = require("gulp-gh-pages");
+
+// broken gift dependency in gulp-gh-pages. Using community adopted fork
+// https://github.com/shinnn/gulp-gh-pages/pull/117
+var ghPages = require("gulp-gh-pages-will");
 var merge = require("lodash.merge");
 var fs = require("fs-extra");