Hotfix Release 1.57

Makefile.PL: fix wrong t/modules.pm dependency

Release 1.56

with updated log.modules and docs.
fixup log. version suffices in the Makefile.
Update t/CORE results.

travis: update

C.xs: silence -Wunused-variable targ

Release 1.55_08

fixed REGEXP since 5.27.3, issue 143.

Release 1.55_07

to be tested with cperl 5.27.3c

C: fix %cvstashname, add t/testc/sh 411

fix mingw importlib name.

use the B $padlist->id, $padlist->outid methods,
remove our variant from C.xs,
I've overlooked these. (undocumented in B).

B::C: 1.55_03 after 5.26.0

5.26.0 is still not supported though.
just syncing latest fixes from cperl, which is supported.

B::C 1.55_02: various fixes

Fix hints/522_patched.pl dependency on C.so [cpan #120161]
Fixed t/sigs.t test TODOs
More 5.24 CC and 5.25 TODOs
re-add appveyor.yml (but with mingw)

C 1.54_17/1.55_01: pushre/split optimization with 5.26

pushre was replaced by the new split PMOP.