Update old and vulnerable dependencies (#101)

* Remove ascii support as it is not really used anywhere. Keep the code just in case a use case comes back in the future

* Replace inline style into CSS

* use happy-dom for snapshot testing

* fix linting rules

* remove fs-extra library as fs can handle our usecase now

* Replace showdown with marked for MD to HTML conversion

* Replace those dependencies

* fix local running

* Add styles to Github alerts and add checknboxes for testing

* Add back emoji support

* Fix snapshots with new css

* Add more Git Flavour tests cases to the local markdown

* ignore coverage folder

* upgrade for Node 22

* replace build process from babel to esbuild

Author: andysteadbbc

.gitignore

@@ -16,6 +16,7 @@ node_modules/
 build/
 
 # Test results
+coverage
 test-results.json
 
 # Local dev

.node-version

@@ -1 +1 @@
-18
+22

.nvmrc

@@ -1 +1 @@
-18
+22

default-md-files/folder/subFolder/nestedSubFolder/nestedSubFile.md

@@ -1 +1,17 @@
-## This is a file in a nested sub folder
+## This is a file in a nested sub folder
+
+### Dev checklist
+
+- [ ] Checklist item 1 - unchecked
+- [x] Checklist item 2 - checked
+- [ ] Checklist item 3 - unchecked
+
+### Ignore Formatting
+
+Let's rename \*our-new-project\* to \*our-old-project\*
+
+### Nested Bullets
+
+100. First list item
+  - First nested list item
+    - Second nested list item

default-md-files/morty-docs.md

@@ -26,7 +26,14 @@ Do images still work?
 
 ![Image 1](./folder/subFolder/test.jpg)
 
-## Github Alerts
+## :warning: Icons, highlights and bullet points
+
+- `warning` - typically used as an early warning system. May not require any action and will not be
+  actioned by 247/Ops.
+- `critical` - an alarm that 247/Ops should act on indicating direct audience impact. Ops will
+  consult your product runbook and perform the required escalation actions listed there.
+
+## ⚠️ Github Alerts
 
 > [!NOTE]  
 > Highlights information that users should take into account, even when skimming.

jest.config.js

@@ -1,6 +1,3 @@
 module.exports = {
-  'snapshotSerializers': ['jest-serializer-html'],
-  'snapshotFormat': {
-    'printBasicPrototype': true
-  }
+  testEnvironment: '@happy-dom/jest-environment'
 }