Bump version. (#98)

Also, allow release build to publish prereleases and update
dependencies.

Fixes #97

Author: mrstegeman

.github/workflows/release.yml

@@ -4,6 +4,7 @@ on:
   push:
     tags:
       - v[0-9]+.[0-9]+.[0-9]+
+      - v[0-9]+.[0-9]+.[0-9]+-alpha.[0-9]+
 
 jobs:
   build: