chore: prepare release of v0.1.3

[davidme-stripe]

• Update README
• Update CHANGELOG with any new features or breaking changes (be thorough when reviewing commit history)

0.1.3 - 2021-06-04

• #309 feat: add retrieveSetupIntent method (#294)
• #306 feat: add dangerouslyGetFullCardDetails prop to CardField component (#280)
• #298 feat: support SetupIntents in payment sheet (#293)
• #296 chore: support testID prop in all UI components (#268)
• #295 feat(ios): return the paymentMethod object when presentApplePay resolves (#271)
• #273 feat: enrich the response error objects with additional information (#206)
• #276 fix(android): payment sheet not opening when stripeAccountId set (#267)
• #266 feat(ios): add borderRadius prop to the ApplePayButton component (#258)
• #260 feat: add the StripeContainer component that allows for dismissal of the keyboard when wrapped around the CardField compnent (#222)
• #255 fix(android): crash on onActivityResult when Stripe isn't initalized