Log Message:
libical: update to 3.0.16.

Version 3.0.16 (17 October 2022):
---------------------------------
 * Fix regressions in 3.0.15 due to improperly tested fuzz fixes
 * Fix argument guards in icaltime_as_timet to match documentation and tests.

Version 3.0.15 (06 October 2022):
---------------------------------
 * Add missing property parameters into libical-glib
 * Fix CMake option USE_32BIT_TIME_T actually uses a 32-bit time_t value
 * Fix icaltime_as_timet, which returned incorrect results for years >= 2100,
   to work properly between years 1902 and 10k.
 * Fix x-property comma handling and escaping
 * Built-in timezones updated to tzdata2022d (now with a VTIMEZONE for each time \ 
zone alias)
 * Fix a fuzzer issue
 * Handle unreachable-code compile warnings with clang
 * Ensure all vanew_foo() calls finish with (void*)0 (not 0)