* init npm-unpacked-size service
* add sample badge
* fetch unpacked size from latest version
* format unpacked size
* parametrize unpacked size by package name
* add optional version parameter
* fix typo on test
* rename test to tester
* test against json endpoint instead of svg
* test and impl version with undefined unpacked size
* test version with defined unpacked size
* change color to lightgray when unpackedSize is undefined
* add openapi docs
* extend NpmBase instead of BaseJsonService
* use isFileSize validator
* add schema to validate npm registry response body
* add tests for scoped packages
* impl scoped package route
* change the type of schema.dist.unpackedSize to optionalNonNegativeInteger
* add registry_uri query param
* add default label to badge
* unpack tag instead of version
* revert back to versions instead of tags
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