v0.4.0

• Fix incorrect default value in docstrings for strict argument
• Fix incorrect exception handling for any_css_matches
• Fix docstring for css_first method
• Fix memory leak in merge_text_nodes for lexbor backend
• Update lexbor backend
• Add .inner_html property. Allows to get and set inner HTML of a node.
• Update various docstrings.
• Optimize performance forcss_first in lexbor backend
• Fix segfaults when accessing attributes. Resolves #135.
• Add new .clone method to lexbor backend. Resolve #117.
• Improve unicode handling for malformed text. Resolves #138.
• Fix segfaults when doing double .decompose. Resolves #179.
• Fix sefgaults when doing double .unwrap. Resolves #169.
• Fix typo for tag names. Clarify available tag names.