fix: typings in dist

[kuzhelov]

Proposed solution to fix #87.

The idea, essentially, is to replace inlined imports with absolute typing file path on its relative analog (the one that we would like to obtain from TS compiler but cannot do that) - during build process as separate stage added into gulp's pipeline.

Benefits

We won't need to require devs to do this unintuitive hack anymore to circumvent problem of TS transpiling

public static defaultProps = {
    ...
    // without explicit 'as' cast to DefaultBehavior's type (!!) this will introduce aforementioned problem for generated TS definitions
    accessibility: DefaultBehavior as Accessibility,
}

Design priorities

• being easily removable (in case if better fix will be introduced)
• affect only those parts that we pretty sure are problematic
• introduce robust logic

[codecov]

Codecov Report

Merging #99 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #99   +/-   ##
=======================================
  Coverage   86.05%   86.05%           
=======================================
  Files          39       39           
  Lines         667      667           
  Branches       93      102    +9     
=======================================
  Hits          574      574           
  Misses         90       90           
  Partials        3        3

Impacted Files	Coverage Δ
src/components/Provider/ProviderConsumer.tsx	100% <100%> (ø)	⬆️

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