[pygobject] Drop Python 3.3 support

[Christoph Reiter <creiter src gnome org>]

commit 46a9dade170127006df98d44b1a9fb2035ada86b
Author: Christoph Reiter <creiter src gnome org>
Date:   Fri Nov 24 17:40:11 2017 +0100

    Drop Python 3.3 support
    
    It's EOL and not used much (https://hynek.me/articles/python3-2016/)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790787

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index cff7762..8ccccb8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -13,7 +13,7 @@ AC_PREREQ([2.68])
 #   $ ./configure --with-python=~/my-patched-python/python
 
 m4_define(python_min_ver, 2.7)
-m4_define(python3_min_ver, 3.3)
+m4_define(python3_min_ver, 3.4)
 
 dnl the pygobject version number
 m4_define(pygobject_major_version, 3)