Cleanup Safari 8 bug note in `isFunction`. [ci skip]
Cleanup Safari 8 bug note in `isFunction`. [ci skip]

BernhardRode/lodash,BernhardRode/lodash,BernhardRode/lodash,dgoncalves1/lodash,dgoncalves1/lodash,lekoaf/lodash,lekoaf/lodash,dgoncalves1/lodash,lekoaf/lodash