ci: allow failure for broken Jest/Node.js version combo

.travis.yml

@@ -58,6 +58,13 @@ matrix:
       if: branch = master AND type = push
       addons:
         apt: *APT
+
+jobs:
+  allow_failures:
+    # Remove when Jest and/or Node.js are fixed
+    - node_js: 'stable'
+      env: UNIT=true
+
 before_install:
 - nvm install-latest-npm
 install: