docs: updates for version 1.0.0

Author: t-graf

ChangeLog.md

@@ -1,5 +1,14 @@
 # SW360 Base Library for Python
 
+## 1.0.0
+* **New Features**:
+  * `get_projects_by_tag` added.
+  * `get_releases_by_name` added.
+  * `get_all_vendors` added.
+* We have covered nearly all of the possibel REST API calls.
+  The library is successfully being used by multiple projects.
+  Time to release version 1.0.0.
+
 ## V0.9.1
 * **New Features**:
     * support to retrieve information about clearing requests (`get_clearing_request`, `get_clearing_request_for_project`).