fix(Optimizely): Use any type for return value of setTimeout

[mjc1283]

Summary

Fix for #622 . For the Node.js version of setTimeout, the return value isn't number, but Timeout. To allow this to typecheck regardless of whether the browser or Node.js version is used, set the type of readyTimeout to any.

Test plan

Existing tests

Issues

#622

[coveralls]

Coverage remained the same at 96.706% when pulling 7888515 on mc/issue-622 into 058d0db on master.

[coveralls]

Coverage remained the same at 96.706% when pulling 67d211e on mc/issue-622 into 058d0db on master.