feat: Update to use Node 20.8.1 (#17)

Updating to use Node 20.8.1 and also updated dependencies at the same
time.

However, there should be no change to the assets generated.

Author: randombitsUK

.editorconfig

@@ -0,0 +1,21 @@
+# For more information about the properties used in
+# this file, please see the EditorConfig documentation:
+# http://editorconfig.org/
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[package.json]
+# The indent size used in the `package.json` file cannot be changed
+# https://github.com/npm/npm/pull/3180#issuecomment-16336516
+indent_size = 2

.nvmrc

@@ -1 +1 @@
-v18.17.1
+v20.8.1

package-lock.json

@@ -37,7 +37,7 @@
     "sass-mq": "6.0.0"
   },
   "devDependencies": {
-    "sass": "1.65.1",
+    "sass": "1.69.5",
     "sass-mq": "6.0.0"
   }
 }