The change [1] in KDE Frameworks leads to the configuration
ecm_setup_version(PROJECT
VARIABLE_PREFIX IMEJyutping
PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/LibIMEJyutpingConfigVersion.cmake"
SOVERSION 0)
accepting the value '0' as so-version, and not defaulting to the
softwares major version (here 1).
This leads to the .so.1 being renamed to .so.0 in the final package.
[1] 1da0bba97d
PR: 273695