try drop pyyaml

[chirizxc]

Description

Starting with v0.6.0 faststream supports AsyncAPI 3.0.

The AsyncAPI 3.0 documentation states:

In order to preserve the ability to round-trip between YAML and JSON formats, YAML version 1.2 is recommended along with some additional constraints:

• Tags MUST be limited to those allowed by the JSON Schema ruleset
• Keys used in YAML maps MUST be limited to a scalar string, as defined by the YAML Failsafe schema ruleset

Note: AsyncAPI use js-yaml as parser, *js-yaml playground

According to spec, yaml of the following type:

protocolVersion: ! "3.2"

should be converted to {protocolVersion: "3.2"}, i.e. to a string, but PyYAML converts it to an float:

import yaml

y = "protocolVersion: ! '3.2'"

print(yaml.safe_load(y))  # {'protocolVersion': 3.2}
print(type(yaml.safe_load(y)["protocolVersion"]))  # <class 'float'>

(Also, PyYAML does not fully support YAML v1.2.* and does not pass the official yaml-test-suite).

Valid AsyncAPI config: https://studio.asyncapi.com/?share=851921b7-91cd-414c-9438-e94876953c0d

but faststream cannot load it

❯ faststream docs serve asyncapi.yaml                                                                                                                 
`asyncapi.yaml` not supported. Make sure that your schema is valid and schema version supported by FastStream

Type of change

Please delete options that are not relevant.

• Documentation (typos, code examples, or any documentation updates)
• Bug fix (a non-breaking change that resolves an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a fix or feature that would disrupt existing functionality)
• This change requires a documentation update

Checklist

• My code adheres to the style guidelines of this project (just lint shows no errors)
• I have conducted a self-review of my own code
• I have made the necessary changes to the documentation
• My changes do not generate any new warnings
• I have added tests to validate the effectiveness of my fix or the functionality of my new feature
• Both new and existing unit tests pass successfully on my local environment by running just test-coverage
• I have ensured that static analysis tests are passing by running just static-analysis
• I have included code examples to illustrate the modifications

[CLAassistant]

All committers have signed the CLA.