The packages are renamed as follows:
	* yowasp-nextpnr-{ice40,ecp5}-all → yowasp-nextpnr-{ice40,ecp5}
	* yowasp-nextpnr-{ice40,ecp5} → yowasp-nextpnr-{ice40,ecp5}-base

This matches the way yowasp-nextpnr-nexus works, and solves
a usability issue where installing just yowasp-nextpnr-{ice40,ecp5}
(a perfectly reasonable choice, going off the name alone) installs
a yowasp-nextpnr-{ice40,ecp5} launcher that always crashes, even on
--help.

The yowasp-nextpnr-{ice40,ecp5}-all package is now an alias for
the yowasp-nextpnr-{ice40,ecp5}. It will no longer be advertised
on yowasp.org but it will be packaged and published indefinitely
to preserve compatibility.

The PyPI package size limit used to be 60 MB, which is why the iCE40
target had to use split chipdb packages. (The iCE40 chipdbs are about
70 MB in size). The ECP5 target inherited this architecture.

The PyPI package size limit is now 100 MB, so everything can be
combined into a single package, eliminating most common installation
and dependency related issues at the cost of a small increase in
download size.