Fix Date Handling in Insomnia Collection Import

[anusreesubash]

Importng insomnia files(yaml exports) fails when it contains date values

 url: https://testbench-sanity.usebruno.com/api/echo/json
    name: New Request
    description: ""
    method: GET
    body: {}
    parameters:
      - id: pair_87d0dc461d5a408a93ebfe0fe500fdce
        name: date
        value: 2022-22-02
        description: ""
        disabled: false
      - id: pair_8a903b8bf636404288bba577485d6816
        name: ""
        value: ""
        description: ""
        disabled: false
        

The YAML parser(js-yaml) automatically converts date values into Date objects, which causes issues while validating collection schema.

I have updated the YAML parsing logic to use the CORE_SCHEMA from js-yaml. This way, we avoid automatic conversion of date.

Issue ref to js-yaml repo: nodeca/js-yaml#161

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[helloanoop]

Merged. Thanks @anusreesubash !