Have Travis build Beta and Alpha releases.

black-puppydog · black-puppydog · commit 58d8154e1019 · 2020-11-05T23:51:56.000+01:00
The last beta build didn't actually trigger the expected build
because the branch (well, tag) wasn't white-listed.
This should fix that problem.
diff --git a/.travis.yml b/.travis.yml
@@ -42,3 +42,5 @@ branches:
   only:
   - master
   - "/^v\\d+\\.\\d+\\.\\d+$/"
+  - "/^v\\d+\\.\\d+\\.\\d+-beta.\d+$/"
+  - "/^v\\d+\\.\\d+\\.\\d+-alpha.\d+$/"
