wip/help wanted: fcitx5

Hi,

Here is a WIP port for fcitx5, the successor of inputmethods/fcitx. I
would like to find someone to import this as fcitx4 is no longer being
actively developed. ("no new issue and PR should be created.") [0]

At the moment I'm able to build/package/test/install it with no problem
and I've been daily driving[1] it on both my arm64 and amd64 systems for
about a month. However I'm unable to tame `make port-lib-depends-check`:

fcitx5-5.0.11(inputmethods/fcitx5):
Missing lib: cairo.13 (/usr/local/lib/fcitx5/libclassicui.so) (NOT REACHABLE)
Missing lib: event_core.2 (/usr/local/lib/libFcitx5Utils.so.0.0) (NOT REACHABLE)
Missing lib: harfbuzz.16 (/usr/local/lib/fcitx5/libclassicui.so) (NOT REACHABLE)
Missing lib: pango-1.0.3801 (/usr/local/lib/fcitx5/libclassicui.so) (NOT REACHABLE)
Missing lib: pangocairo-1.0.3801 (/usr/local/lib/fcitx5/libclassicui.so) (NOT REACHABLE)
Missing lib: xkbcommon-x11.1 (/usr/local/lib/fcitx5/libxcb.so) (NOT REACHABLE)
Missing lib: xkbcommon.1 (/usr/local/lib/libFcitx5Core.so.0.0) (NOT REACHABLE)
*** Error 1 in target 'port-lib-depends-check' (ignored)

I tried to figure out this by reading the source of
port-lib-depends-check, but with little success, anyone know how can I
tame this?

[0]: https://github.com/fcitx/fcitx/blob/master/README
[1]: I also ported many fcitx5 IME IM modules but they would be too many
for this email...