* adds definitions and types according to ink v5 changes
* adds toV5 boilerplate code draft
* adds v5 flipper test contract code
* fix license dates
* adds test v5 toLatest test
* implements new scheme to determine event
* apply linter changes
* adds test result outputs
* change `EventRecord['topics'][0]` type to plain `Hash`
* adds testcases for decoding payload data of a ink!v4 and ink!v5 event
* changes `Abi.decodeEvent(data:Bytes)` method interface to `Abi.decodeEvent(record:EventRecord)` which includes the event and the topic for decoding.
* draft implementation with version metadata
* cleaner implementation of versioned Metadata by actually leveraging the `version` field included since v2 contract metadata
* trying to make linter happy
* makes `ContractMetadataSupported` in internal to `Abi` type and not exposing it externally.
* properly types unused parameter for tsc 🤷
* adds `@polkadot/types-support` dev dependency
* Update yarn.lock
* references `types-support` in `api-contract
* resolving change requests
* resolves linter warnings
* changes ContractMetadataV5 field to `u64` from `Text`
* adds contracts and contract metadata compiled with the most recent ink version
* implements decoding of anonymous events if possible
* removes done todo comments
Tarik Gul