feat!: upgraded to node v18, added .nvmrc and updated workflows (#332)

BREAKING CHANGE: Ending support of @edx/frontend-platform v2 and v3 and now only support v4

Author: BilalQamar95

.github/workflows/lockfileversion-check.yml

@@ -10,4 +10,4 @@ on:
 
 jobs:
   version-check:
-    uses: openedx/.github/.github/workflows/lockfileversion-check.yml@master
+    uses: openedx/.github/.github/workflows/lockfileversion-check-v3.yml@master

.nvmrc

@@ -1 +1 @@
-16
+18