textproc/libxml2 missing PORTREVISION bump?

In the process of updating chromium (due to security vulnerability), I
got this compile error:

python3 ../../build/gn_run_binary.py ./v8_context_snapshot_generator 
--snapshot_blob=snapshot_blob.bin --output_file=v8_context_snapshot.bin
ld-elf.so.1: Shared object "libicudata.so.74" not found, required by 
"libxml2.so.2"
./v8_context_snapshot_generator failed with exit code 1

Context: I use portmaster instead of poudriere.  After digging around,
it transpired that libxml2 had not been recompiled recently, and after
recompiling it, the chromium build succeeded.  Is it possible that the
PORTREVISION of libxml2 should have been bumped somewhere along the
line (due to a recent revision of icu)?                  -- George