test: bump test-run to new version [WIP]

Bump test-run to new version with the following improvements:

- Bump luatest to 1.0.0-5-gxxx (WIP tarantool/luatest#355) [1]
- Disable verbose serialization of box.error in diff tests [2]

[1] tarantool/test-run@xxx (WIP tarantool/test-run#tarantool#424)
[2] tarantool/test-run@xxx (WIP tarantool#424)

NO_DOC=test
NO_TEST=test
NO_CHANGELOG=test

Author: CuriousGeorgiy

.gitmodules

@@ -17,7 +17,7 @@
 	ignore = dirty
 [submodule "test-run"]
 	path = test-run
-	url = https://github.com/tarantool/test-run.git
+	url = https://github.com/curiousgeorgiy/test-run.git
 	ignore = dirty
 [submodule "src/lib/small"]
 	path = src/lib/small