meson.build: define version (#135)

thesamesam · web-flow · commit ad0211b00d9b · 2022-03-26T10:30:50.000+13:00
Otherwise, the installed .pc file contains "Version: undefined".

Signed-off-by: Sam James &lt;sam@gentoo.org&gt;
diff --git a/meson.build b/meson.build
@@ -1,6 +1,7 @@
 project('inih',
     ['c'],
     license : 'BSD-3-Clause',
+    version : '54',
 )
 
 #### options ####
