thin out tests

Author: wheresvic

.github/workflows/ci.yml

@@ -18,8 +18,8 @@ jobs:
     strategy:
       matrix:
         #node-version: [12.x]
-        node-version: [8.x,10.x,12.x,14.x]
-        mongodb-version: [4.0, 4.2, 4.4, 5.0, 6.0]
+        node-version: [10.x,12.x,14.x]
+        mongodb-version: [4.4, 5.0, 6.0]
 
     steps:
     - name: Git checkout