Add an explicit check for MRI, don't define TS::Array or TS::Hash for other platforms.
Add an explicit check for MRI, don't define TS::Array or TS::Hash for other platforms.

ruby-concurrency/thread_safe,ruby-concurrency/thread_safe,headius/thread_safe,rranelli/thread_safe,rranelli/thread_safe,headius/thread_safe,ruby-concurrency/thread_safe,rranelli/thread_safe