Bump pylint to 2.15.0, update changelog

Author: Pierre-Sassoulas

CONTRIBUTORS.txt

@@ -118,6 +118,7 @@ contributors:
 - Julien Palard <[email protected]>
 - David Liu <[email protected]> (david-yz-liu)
 - Dan Goldsmith <[email protected]>: support for msg-template in HTML reporter.
+- Buck Evan <[email protected]>
 - Mariatta Wijaya <[email protected]>
   * Added new check `logging-fstring-interpolation`
   * Documentation typo fixes
@@ -434,6 +435,7 @@ contributors:
 - Kevin Phillips <[email protected]>
 - Kevin Jing Qiu <[email protected]>
 - Kayran Schmidt <[email protected]>
+- Karthik Nadig <[email protected]>
 - Jürgen Hermann <[email protected]>
 - Jérome Perrin <[email protected]>
 - Josselin Feist <[email protected]>
@@ -484,6 +486,7 @@ contributors:
 - Dr. Nick <[email protected]>
 - Don Jayamanne <[email protected]>
 - Dmytro Kyrychuk <[email protected]>
+- DetachHead <[email protected]>
 - Denis Laxalde <[email protected]>
 - David Cain <[email protected]>
 - Danny Hermes <[email protected]>