Create pull_request_template.md

Update issue templates

Fix typos and add labels

Merge pull request #54 from JlUgia/fix/rounding-error-on-visual-price

Use strings instead of longs for price amounts to avoid rounding inconsistencies in BigDecimal

Bump version and update error handling on Java too

Make developer errors more specific, and generalize internal errors with other unexpected types

Bump wallet library version

Update licenses

Keep function for backwards compatibility

Simplify JSON construction

Make Java and Kotlin integrations look more alike

Name variables in the resulting block more clearly

Move payment request action to a private function

Merge pull request #45 from JlUgia/activity-result-api