doc(changelog): update to 1.0.0

CHANGELOG.md

 
 # CHANGELOG
 
+## Version 1.0.0 (2020-11-30)
+### New features
+
+- change the tag to prevent assignbot assigning a reviewer to 'no-assignbot'
+  *BREAKING CHANGE*: assignbot will ignore the 'no-assignbot' tag, and not the 'client-project'
+
+### Various changes
+
+- update the changelog
+
+
 ## Version 0.3.0 (2020-11-18)
 ### New features