Update all devDependencies.

Keep grunt at v0.4.5 due to some of the devDependencies not being updated for grunt 1.x.

docs/_pug/customizer-nav.pug

@@ -0,0 +1,17 @@
+// NOTE: DO NOT EDIT THE FOLLOWING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-nav.pug template.
+li
+  a(href='#import-drop-target') Import
+li
+  a(href='#less') Less components
+li
+  a(href='#plugins') jQuery plugins
+li
+  a(href='#less-variables') Less variables
+  ul.nav
+    each section in sections
+      if section.customizable
+        li
+          a(href='#'+section.id)= section.heading
+li
+  a(href='#download') Download
+// NOTE: DO NOT EDIT THE PRECEDING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-nav.pug template.

docs/_pug/customizer-variables.pug

@@ -0,0 +1,25 @@
+// NOTE: DO NOT EDIT THE FOLLOWING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-variables.pug template.
+each section in sections
+  if section.customizable
+    h2(id=section.id)= section.heading
+    if section.docstring
+      p!= section.docstring.html
+    each subsection in section.subsections
+      if subsection.heading
+        h3(id=subsection.id)= subsection.heading
+      div.row
+        each variable, index in subsection.variables
+          if index > 0 && index % 3 === 0
+            div.clearfix
+          div.col-xs-4
+            label(for="input-" + variable.name)= variable.name
+            - var helpId = "help-block-" + variable.name
+            input.form-control(
+              id="input-" + variable.name
+              type="text"
+              aria-describedby=variable.docstring ? helpId : undefined
+              value=variable.defaultValue
+              data-var=variable.name)
+            if variable.docstring
+              p.help-block(id=helpId)!= variable.docstring.html
+// NOTE: DO NOT EDIT THE PRECEDING SECTION DIRECTLY! It is autogenerated via the `build-customizer-html` Grunt task using the customizer-variables.pug template.