Let full matrix build

Otherwise we can't see directly which version is failing

Author: eps1lon

.github/workflows/validate.yml

@@ -16,6 +16,7 @@ jobs:
     # ignore all-contributors PRs
     if: ${{ !contains(github.head_ref, 'all-contributors') }}
     strategy:
+      fail-fast: false
       matrix:
         node: [10.13, 12, 14, 16]
         react: [latest, next, experimental]