Instagram changes again

[N0taN3rd]

behaviors - instagram: implemented a structural approach to viewing post comments behaviors - lib:

• lifted restriction for traversal functions to be async iterators, they can now be any value returning function
• added ability to check if an elements text contents contains a substring case insensitive
• added general functions for checking if a value is a generator, async generator, or promise
• generalized instagrams post comment core logic into two function found in lib/clicks
• removed defaulting to smooth scroll in scrollWindowDownBy functions
• added smooth scroll window down by functions