Rewrite library in TS

• Library Rewritten in TypeScript
• Now createUseContext returns only hook, to actually use Context in a type-safe manner
• All the wrappers for Providers removed
• Helper createWithContext removed as non actual

UMD bundle removed

• UMD bundle removed
• README.md updates
• node packages versions bump

Rolup config fix

• FIx of unused import in Rollup config

createWithContext helper

• createWithContext helper added to create HOC's
• Signature of createUseContext return value changed to object
• Tree shaking capabilities added for both helper functions

Babel configuration

• Babel plugin for rollup added and configured

README updates, code cleanup

• README updates
• code cleanup