Log Message:
inputmethod/librime: Update to 1.9.0

* Convert to new cmake mechanism.

Changelog:
1.9.0:
Features

    switches: abbreviate state labels #615 (居戎氏)
    dict: shorten the data struct used by Vocabulary #661 (WhiredPlanck)
    add append_comment option to reverse_lookup_filter (#699) #699 (ksqsf)

Bug Fixes

    avoid invalid page_size (#679) #679 (Qijia Liu)

Code Refactoring

    vocabulary.h: align the size of DictEntry struct #661 (WhiredPlanck)
    dict_compiler.cc: correct the usage of auto in loop #661 (WhiredPlanck)

Performance Improvements

    dict: improve dict complile performance (#663) #663 (WhiredPlanck)
    replace rbtree with vector of pair (#684) #684 (Qijia Liu)
    release memory of temporary fields (#690) #690 (Qijia Liu)

1.8.5:
Bug Fixes

    selector: do not match fallback modifier (居戎氏)

1.8.4:
Chores

    skip super key combos; amend merge result (居戎氏)