Add applyTo to all Apply ADTs

[evilsoft]

This is the first step in 💯 fantasy-land integration of ap. Will define applyTo on all Apply types which will match the fantasy-land signature. This will be the method that will eventually map to fantasy-land/ap.
In order to handle proper error reporting, method will be need to take in the method name as context:

// applyTo :: Apply m => m a ~> m a -> m (a -> b) -> m b
const applyTo = name => m => (...)

This will be provided for the following types:

• Async
• Const
• Either
• IO
• Identity
• List
• Maybe
• Pair
• Reader
• Result
• State
• Unit
• Writer

Initially we will not provide a point free function for this method as there is a combinator named applyTo that is used for applying a value to functions...We will need to do a breaking change and some function name juggling:

• mv combinators/applyTo -> combinators/applyWith
• mv combinators/reverseApply -> pointfree/applyTo
• Update pointfree/applyTo to take either (value, function) OR (m value, m function) where m is an Apply of the same type. It should error unless those pairs are exactly met.

[pfgray]

Hey, mind if I take a stab at this one? I've created a branch & impl'd a first cut at Async's applyTo here.

I've tested it out with other applicatives and it works swimmingly.