chore: update node version in tests (#618)

Author: ascorbic

.github/workflows/test.yml

@@ -12,12 +12,12 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macOS-latest, windows-latest]
-        node-version: [10.13.0, '*']
+        node-version: [12, '*']
         exclude:
           - os: macOS-latest
-            node-version: 10.13.0
+            node-version: 12
           - os: windows-latest
-            node-version: 10.13.0
+            node-version: 12
       fail-fast: false
 
     steps: