Update to 1.42

Upstream changes:
1.42  2021-05-07
        - Makefile.PL: force rlver to link with a terminal library
            - fix compile error on some of Cygwin environments and others. [#7]
        - ppport.h: update from version 3.52 to version 3.62.
            - fix compile errors on PERL_VERSION_LT() in Gnu.c generated by some
              versions of ExtUtils::MakeMaker. [#8]

1.41  2021-05-01
        - Makefile.PL
            - Search a terminal library only when it necessary. [#6]
            - whole refactoring

(wen)