feat: allows for a custom head partial (#21)

Author: esacteksab

layouts/partials/head.html

@@ -28,11 +28,14 @@
 {{ partialCached "head/css.html" . -}}
 {{- partialCached "fonts.html" . -}}
 {{- partialCached "head/js.html" . -}}
-<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
-<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png">
-<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png">
-<link rel="manifest" href="/site.webmanifest">
+<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png"/>
+<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png"/>
+<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png"/>
+<link rel="manifest" href="/site.webmanifest"/>
 <!-- https://gohugo.io/templates/rss/#include-feed-reference -->
 {{- with .OutputFormats.Get "rss" }}
     {{- printf `<link rel=%q type=%q href=%q title=%q>` .Rel .MediaType.Type .Permalink site.Title | safeHTML -}}
-{{- end -}}{{- /* Trim EOF */ -}}
+{{- end -}}
+<!-- Add your custom headers here -->
+{{- partial "head-custom.html" . -}}
+{{- /* Trim EOF */ -}}