Prepare 0.16.0 release

Author: nyamsprod

docs/_data/project.yml

@@ -6,7 +6,7 @@ description: "A framework-agnostic PHP library that allows you to profile and ga
 package: 'bakame/stackwatch'
 repository_url: 'https://github.com/bakame-php/stackwatch'
 release_major: '1.0'
-version: '0.15.0'
+version: '0.16.0'
 support: 'Once a new major version is released, the previous stable release remains supported for six more months with patches and security fixes.'
 releases:
 #    current: