update version number to 5.0.0
update changelog/credits and bump to version 4.2.0
switch to version 4.1.0
switch to version 4.0.0
switch to version 3.1.1
switch to version 3.1.0
switch to version 3.0.1
switch to version 3.0.0
switch to version 2.14.3
switch to version 2.14.2