test: update test-run

Fixed app/strict.test.lua fail after a test that sets 'a' global
variable. It was due to the way how 'strict' module tracks declared
global variables and was fixed in pretest_clean.lua test-run's module.

test-run @ 37d15bd7

-Subproject commit a04b5b096c607172ce4fc86a84e3531c9f3a7304
+Subproject commit 37d15bd781ddfb41dfd75d9b761c180395b4b53f