Remove support for Node.js 16

Author: remcohaszing

.github/workflows/ci.yaml

@@ -44,7 +44,6 @@ jobs:
     strategy:
       matrix:
         node-version:
-          - 16
           - 18
           - 20
     steps:

README.md

@@ -108,7 +108,7 @@ A custom prefix to use for Mermaid IDs. (`string`, default: `mermaid`)
 
 ## Compatibility
 
-This project is compatible with Node.js 16 or greater.
+This project is compatible with Node.js 18 or greater.
 
 ## Related Projects