Explicitly check for the existence of a certificate

Merge pull request #16 from tombailey/master

Potential fix for issue #14

Use hybrid RSA and AES keys

This release includes

• Use hybrid RSA and AES keys to resolve RSA 256bytes input limit
• Also extends default RSA key to 50 years until expiry

Remove unused registration of JS modules in respect to React-native v0.47.0

Merge pull request #2 from cngroupdk/rn-0.47.1-breaking-change-fix

RN v 47 - breaking change fix: remove unused registration of JS modules

Added error objects

v1.0.5

build version bump

Handle app uninstallation

v1.0.4

added handle app uninstallation

fixed key value not updating problem

v1.0.3

version bump

v1.0.2

update readme and also add to npmjs