ci(exist-version): latest version is experimental

Since the latest version of existdb might contain breaking changes
it will abort the tests on other versions when it fails.
Marking it as experimental allows us to see when
it fails without sacrificing the builds on versions
that we will ensure compatibility with.

.github/workflows/node.js.yml

@@ -8,9 +8,16 @@ on: [push, pull_request]
 jobs:
   build:
     runs-on: ubuntu-latest
+    continue-on-error: ${{ matrix.experimental }}
     strategy:
+      fail-fast: true
       matrix:
-        exist-version: [latest, release, 5.5.1]
+        exist-version: [release, 6.0.1, 5.5.1]
+        experimental: [false]
+        # latest might contain breaking changes
+        include:
+          - exist-version: latest
+            experimental: true
     services:
       exist:
         image: existdb/existdb:${{ matrix.exist-version }}