Add GitHub emojis support (#158)

source/plugins/core/README.md

@@ -39,6 +39,22 @@ Omitted one will be appended using default order.
     config_order: base.header, isocalendar, languages, stars
 ```
 
+### 🥳 Render GitHub custom emojis
+
+GitHub provide additional emojis which are not registered in Unicode standard (:octocat:, :shipit:, :trollface:, ...).
+You can choose to render (or not) [GitHub emojis](https://github.com/github/gemoji).
+
+It may increase filesize since it replace special strings by base64 images.
+
+#### ℹ️ Examples workflows
+
+```yaml
+- uses: lowlighter/metrics@latest
+  with:
+    # ... other options
+    config_gemoji: yes
+```
+
 ### 🙂 Using twemojis instead of emojis
 
 You can choose to use [twemojis](https://github.com/twitter/twemoji) instead of regular emojis so rendered metrics are more consistent across all platforms.

source/plugins/core/metadata.yml

@@ -96,6 +96,13 @@ inputs:
     type: boolean
     default: no
 
+  # Render GitHub custom emojis (like ":octocat:", see full list at https://api.github.com/emojis)
+  # May increase filesize
+  config_gemoji:
+    description: Use GitHub custom emojis
+    type: boolean
+    default: yes
+
   # Enable SVG CSS animations
   config_animations:
     description: SVG CSS animations

source/plugins/core/tests.yml

@@ -16,6 +16,12 @@
     token: MOCKED_TOKEN
     config_twemoji: yes
 
+- name: Use gemoji
+  uses: lowlighter/metrics@latest
+  with:
+    token: MOCKED_TOKEN
+    config_gemoji: yes
+
 - name: Disable animations
   uses: lowlighter/metrics@latest
   with: