Fix DB schema files location with Module::Build

lib/App/Netdisco/DB.pm

@@ -14,10 +14,9 @@ our # try to hide from kwalitee
   $VERSION = 41; # schema version used for upgrades, keep as integer
 
 use Path::Class;
-use File::Basename;
+use File::ShareDir 'dist_dir';
 
-my (undef, $libpath, undef) = fileparse( $INC{ 'App/Netdisco/DB.pm' } );
-our $schema_versions_dir = Path::Class::Dir->new($libpath)
+our $schema_versions_dir = Path::Class::Dir->new( dist_dir('App-Netdisco') )
   ->subdir("DB", "schema_versions")->stringify;
 
 __PACKAGE__->load_components(qw/