Prep beta10 release (#766)

* Prep beta10 release

* trigger gitlab deploy on tags

Author: nmuesch

.github/workflows/prepare-release.yml

@@ -11,7 +11,8 @@ deploy_to_sonatype:
   stage: deploy_to_sonatype
   tags: [ "runner:docker", "size:large" ]
   image: maven:3.6.3-jdk-8-slim
-  when: manual
+  only:
+    - tags
   script:
     # Ensure we don't print commands being run to the logs during credential
     # operations

.gitlab-ci.yml

@@ -4,7 +4,7 @@
     <artifactId>datadog-api-client</artifactId>
     <packaging>jar</packaging>
     <name>datadog-api-client</name>
-    <version>1.0.0-beta10-SNAPSHOT</version>
+    <version>1.0.0-beta10</version>
     <url>https://github.com/DataDog/datadog-api-client-java</url>
     <description>Java client library for Datadog API</description>
     <scm>