Yeah, to see the packages with multiple versions:

  grep 'name = ' ms-litebox-Cargo.lock | sort | uniq -c | grep -v '1 name' | sort -n

Edit: Also, beware of the unsorted uniq count:

  cat <<EOF | uniq -c
  > a
  > a
  > b
  > a
  > a
  > EOF
   2 a
   1 b
   2 a

grep -v '1 name' excludes 11, 21, etc., but I take your point.