[gtk-mac-integration] Use AM_GNU_GETTEXT_REQUIRE_VERSION instead of AM_GNU_GETTEXT_VERSION

[John Ralls <jralls src gnome org>]

commit 9c86d0c7485acadacafde538d2533aa6ecca91f5
Author: John Ralls <jralls ceridwen us>
Date:   Mon Jan 11 14:13:03 2021 -0800

    Use AM_GNU_GETTEXT_REQUIRE_VERSION instead of AM_GNU_GETTEXT_VERSION
    
    Allows the specified version to be diffeent from the installed
    version.
    
    Requires Autoconf v2.70 or later.

 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/configure.ac b/configure.ac
index 1b1c917..0b9a752 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,7 +30,7 @@ dnl ================================================================
 dnl Gettext stuff.
 dnl ================================================================
 AM_GNU_GETTEXT([external])
-AM_GNU_GETTEXT_VERSION([0.20.2])
+AM_GNU_GETTEXT_REQUIRE_VERSION([0.20.2])
 
 AC_SUBST([GETTEXT_PACKAGE], [gtk-mac-integration])
 AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], "$GETTEXT_PACKAGE", [Define to the gettext package name.])