build: Upgrade to Node 20 (#34)

* feat: updated node to v20

* refactor: updated package-lock & lockfile version check workflow

* refactor: updated package-lock along with ci & lockfile version workflows

Author: BilalQamar95

.github/workflows/ci.yml

@@ -9,7 +9,6 @@ jobs:
     strategy:
       matrix:
         node: [18, 20]
-    continue-on-error: ${{ matrix.node == 20 }}
 
     steps:
       - name: Checkout

.github/workflows/lockfileversion-check.yml

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

.nvmrc

@@ -1 +1 @@
-18
+20