ci: allow prereleases following Semver tagging spec (#1046)

Semantic Versioning 2.0.0 sets in paragraphs 9 and 10 how prereleases should be denoted. This adapts that specification to a Regex pattern.

See more: https://semver.org/#spec-item-9 and https://semver.org/#spec-item-10

.circleci/config.yml

@@ -44,7 +44,7 @@ aliases:
   - &execute_on_release
     filters:
       tags:
-        only: /(v)?[0-9]+(\.[0-9]+)*/
+        only: /v?[0-9]+(\.[0-9]+)+([-+\.][0-9a-zA-Z]+)*/
       branches:
         ignore:
           - /.*/