testcases: add ExtUtils::PkgConfig as explicit dependency

This used to be a transitive dependency through X11::XCB, but the latter
dropped it in version 0.04.

diff --git a/testcases/Makefile.PL b/testcases/Makefile.PL
index 1c9873894abc3102488692d055b4fd136755af99..b1e698ae9182395efcd68f7f4f4edb1d9ee9fd31 100755 (executable)
--- a/testcases/Makefile.PL
+++ b/testcases/Makefile.PL
@@ -11,6 +11,7 @@ WriteMakefile(
         'AnyEvent::I3' => '0.09',
         'X11::XCB'     => '0.03',
         'Inline'       => 0,
+        'ExtUtils::PkgConfig' => 0,
         'Test::More'   => '0.94',
     },
     PM => {}, # do not install any files from this directory