ci: optimise job test (#38)

Author: iamWing

.github/workflows/test.yml

@@ -1,4 +1,4 @@
-name: TEst
+name: Test
 
 on:
   workflow_call:
@@ -24,6 +24,6 @@ jobs:
           node-version: ${{ matrix.node-version }}
           cache: npm
       - name: install
-        run: npm ci
+        run: npm ci --omit optional
       - name: run tests
         run: npm run jest-ci