Add Customizations.

- Add PrismJS dependencies (baked-in)
- Add Ko-fi button (in-line)
- Bump dependencies to fix inability to build.
- Concatenate *.css into single source.css.

package.json

@@ -1,5 +1,5 @@
 {
-    "name": "source",
+    "name": "source-davejansen",
     "description": "A default theme for the Ghost publishing platform",
     "demo": "https://source.ghost.io",
     "version": "1.3.2",
@@ -44,8 +44,8 @@
         "@tryghost/release-utils": "0.8.1",
         "autoprefixer": "10.4.7",
         "beeper": "2.1.0",
-        "cssnano": "5.1.12",
-        "gscan": "4.43.1",
+        "cssnano": "^6.0.2",
+        "gscan": "4.39.4",
         "gulp": "4.0.2",
         "gulp-concat": "2.6.1",
         "gulp-livereload": "4.0.2",
@@ -53,8 +53,8 @@
         "gulp-uglify": "3.0.2",
         "gulp-zip": "5.1.0",
         "inquirer": "8.2.4",
-        "postcss": "8.2.13",
-        "postcss-easy-import": "4.0.0",
+        "postcss": "^8.4.32",
+        "postcss-easy-import": "^4.0.0",
         "pump": "3.0.0"
     },
     "browserslist": [