Scalecodec

* Fixed 'fallback' to 'default' element for StorageEntryMetadataV9
* Westend type registry fixes

**Full Changelog**: https://github.com/polkascan/py-scale-codec/compare/v1.0.14...v1.0.15

Fixed missing entry in StorageHasherV9

Added modifier and docs properties to GenericStorageEntryMetadata

Changes

* Fixed issues decoding nested Calls polkascan/py-substrate-interface143
* Skip unnecessary type conversion for scale_info type registries (performance boost `MetadataV14`)
* Decode Compact bytes to int directly 58

**Full Changelog**: https://github.com/polkascan/py-scale-codec/compare/v1.0.11...v1.0.12

Added docs property to `GenericEventMetadata`

Fixed issue with LookupSource arg decoding in GenericCall 56

**Full Changelog**: https://github.com/polkascan/py-scale-codec/compare/v1.0.9...v1.0.10