utf-8 characters replaced

[gsemet]

Hello.

For this input:

stages:
  - "🔬 checks"
  - "💫 Build"
  - "📦 Package"
  - "🧪 Tests"
  - "📝 Buildinfo"
  - "🚀 Release"

yamlfix generates this output:

stages:
  - "\U0001F52C checks"
  - "\U0001F4AB Build"
  - "\U0001F4E6 Package"
  - "\U0001F9EA Tests"
  - "\U0001F4DD Buildinfo"
  - "\U0001F680 Release"

[gsemet]

I think this might comes from the fact encoding is not provided when loading the YAML file

self.yaml = YAML()