This update for glib2 fixes the following issues:

Security issues fixed:

- CVE-2018-16428: Do not do a NULL pointer dereference (crash).
  Avoid that, at the cost of introducing a new translatable error
  message (bsc#1107121).
- CVE-2018-16429: Fixed out-of-bounds read vulnerability ing_markup_parse_context_parse() (bsc#1107116).

Non-security issue fixed:

- various GVariant parsing issues have been resolved (bsc#1111499)