Convert content of source file into dict result.

def convert_content(self) -> dict:
        """Convert content of source file into dict result."""
        source_content = self.load_content()

        converted = {}

        md_extenstions = [
            'full_yaml_metadata',
            'markdown.extensions.fenced_code',
        ]
        md = markdown.Markdown(md_extenstions)
        content = md.convert(source_content)
        meta = md.Meta

        if meta:
            converted.update(meta)

        if content:
            converted['content'] = content.strip()

        return converted