[gedit-plugins] build: require Meson >= 0.50

[Sébastien Wilmet <swilmet src gnome org>]

commit 7dddbfba6a93afba46442e9c333296d46cc02519
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Tue Nov 12 11:37:36 2019 +0100

    build: require Meson >= 0.50
    
    There was a Meson warning message:
    
    WARNING: Project targetting '>= 0.49' but tried to use feature
    introduced in '0.50.0': install arg in configure_file

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index a584559..50a65fc 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project(
   'gedit-plugins', 'c', # vala is added below if needed, with add_languages().
   version: '3.34.0',
-  meson_version: '>= 0.49'
+  meson_version: '>= 0.50'
 )
 
 gnome = import('gnome')