tests: rename files (00x-*.t is basic stuff, >=100-*.t are tests using IPC)

testcases/t/002-i3-sync.t

@@ -0,0 +1,15 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# checks if i3 supports I3_SYNC
+#
+use X11::XCB qw(:all);
+use X11::XCB::Connection;
+use i3test;
+
+my $x = X11::XCB::Connection->new;
+
+my $result = sync_with_i3($x);
+ok($result, 'syncing was successful');
+
+done_testing;