Release 1.3.0

Update Changelog and Modulefile, ready for release 1.3.0.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #62 from kbarber/release_130

Release 1.3.0
Change stdlib dependency to >= 1.0.0

Previously this was >= 3.2.0, which probably isn't necessary just for
validate_re, plus at the time of writing this it was causing a problem
with the forge.

Signed-off-by: Ken Barber <ken@bob.sh>