Post release version bump to 0.3.0.
Post release version bump to 0.3.0.

glance-/libdivecomputer,glance-/libdivecomputer,Poltsi/libdivecomputer-vms,henrik242/libdivecomputer,henrik242/libdivecomputer,josh-wambua/libdivecomputer,venkateshshukla/libdivecomputer,venkateshshukla/libdivecomputer,josh-wambua/libdivecomputer