Revert "Bump jsx to 3.1.0"

This reverts commit 179e1b8.

This new version is not entirely backwards compatible and our
test suites will need adapting.

(cherry picked from commit 2da9d1c)

Conflicts:
	rabbitmq-components.mk

Author: michaelklishin

rabbitmq-components.mk

@@ -110,7 +110,7 @@ dep_toke                              = git_rmq           toke $(current_rmq_ref
 dep_accept = hex 0.3.5
 dep_cowboy = hex 2.8.0
 dep_cowlib = hex 2.9.1
-dep_jsx = hex 3.1.0
+dep_jsx = hex 2.11.0
 dep_lager = hex 3.9.2
 dep_looking_glass = git https://github.com/rabbitmq/looking_glass master
 dep_prometheus = hex 4.6.0