AUR installation failing for v3.32

Ad per this comment on AUR:

simonweiss [1] added the following comment to opentodolist [2]:

Got the following error trying to install `3.32.0-1`:

(1/1) checking for file conflicts [##############################################################] 100% error: failed to commit transaction (conflicting files) opentodolist: /usr/include/qt5keychain/keychain.h exists in filesystem (owned by qtkeychain-qt5) opentodolist: /usr/include/qt5keychain/qkeychain_export.h exists in filesystem (owned by qtkeychain-qt5) opentodolist: /usr/lib/cmake/Qt5Keychain/Qt5KeychainConfig.cmake exists in filesystem (owned by qtkeychain-qt5) opentodolist: /usr/lib/cmake/Qt5Keychain/Qt5KeychainConfigVersion.cmake exists in filesystem (owned by qtkeychain-qt5) opentodolist: /usr/lib/cmake/Qt5Keychain/Qt5KeychainLibraryDepends.cmake exists in filesystem (owned by qtkeychain-qt5) opentodolist: /usr/lib/qt/mkspecs/modules/qt_Qt5Keychain.pri exists in filesystem (owned by qtkeychain-qt5)

Errors occurred, no packages were upgraded.

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The problem is, that the app installs some files actually belonging to included libraries. We must remove them before installation/packaging.