gobject-introspection: update to 1.64.0.

1.64.0 - 2020-03-07
-------------------

* Update glib annotations (:user:`Rico Tzschichholz <ricotz>`)
* Fix regress scanner tests for non-gcc/clang compilers :mr:`197` (:user:`Chun-wei Fan <fanc999>`)
* Document how to update glib GIR :mr:`199` (:user:`Bastien Nocera <hadess>`)

1.63.2 - 2020-01-17
-------------------

* Update glib annotations (:user:`Rico Tzschichholz <ricotz>`)
* Add GMemoryMonitor to glib annotations :mr:`193` (:user:`Bastien Nocera <hadess>`)
* Fix build reproducibility :mr:`192` (:user:`Joshua Watt <jpewhacker>`)
* Drop deprecated xml.etree.ElementTree.Element.getchildren() calls :mr:`194` (:user:`Miro Hrončok <hroncok>`)
* Support Python 3.8.x+ on Windows :mr:`195` (:user:`Chun-wei Fan <fanc999>`)
* Cross compile support :mr:`64` (:user:`Alexander Kanavin <alex.kanavin>`)
* meson: Visual Studio builds: Use -utf-8 where available :mr:`196` (:user:`Chun-wei Fan <fanc999>`)

1.63.1 - 2019-11-24
-------------------

* Update glib annotations (:user:`Rico Tzschichholz <ricotz>`)
* build: require meson 0.50.1
* build: use proper dylib versioning on macOS :mr:`177` (:user:`Tom Schoonjans  <tschoonj>`)
* scanner: Support array arguments with static keyword :mr:`176` (:user:`Emmanuele Bassi <ebassi>`)
* website: Add Ruby-GNOME to user list :mr:`178` (:user:`kojix2`)
* Fix non-libtool code being run with no nob-libtool dependencies :mr:`179` (:user:`Alistair Buxton <ali1234>`)
* meson: change "cairo" from a boolean to a feature option :mr:`180`
* meson: change "doctool" from a boolean to a feature option :mr:`181`
* Fix a memory leak in g_irepository_get_object_gtype_interfaces() :mr:`182` (:user:`Philip Chimento <ptomato>`)
* ccompiler.py: Fix macro defines with quotes on MSVC :mr:`183` (:user:`Chun-wei Fan <fanc999>`)
* tests: Actually test libregress by specifying the LD_LIBRARY_PATH :mr:`174` (:user:`Corentin Noël <tintou>`)
* examples: Make self contained and add build system integration examples :mr:`189`
* autotools: Make INTROSPECTION_GIRDIR/INTROSPECTION_TYPELIBDIR respect prefix/datadir/libdir :mr:`190`
* girepository: Also store GType cache misses :mr:`191` (:user:`Carlos Garnacho <carlosg>`)
* docs: Document GI_CROSS_LAUNCHER envvar :mr:`175` (:user:`Emmanuele Bassi <ebassi>`)

(wiz)