Bump version to 1.0.1

[kstich]

1.0.1 (2020-05-13)

Features

• The smithy.api#httpPayload trait can now target document shapes. (#431)
• Updated the IDL grammar to include many previously enforced parsing rules. (#434)
• Added the select command to the CLI to print out shapes from a model that match a selector. (#430)
• Added the ast command to the CLI to convert 0 or more Smithy models into a JSON AST. (#435)
• Added a Dockerfile for building Smithy as a Docker image. (#427)

Optimizations

• The Smithy IDL parser has been rewritten and optimized. (#434)
• Generate a class data share to speed up the CLI. (#429)

Bug Fixes

• Fix several ambiguities and issues in the IDL grammar. (#434)
• JSON pretty printing of the AST now uses 4 spaces for indentation. (#435)
• Fix CLI --help output alignment. (#429)

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