v1.12.2

What's Changed

• add partial support for unique_id database property by @nickysemenza in #135
• docs: add comments for PageService by @zaq1tomo in #137
• docs: bruch up readme.md by @zaq1tomo in #136
• docs: add comments for services by @zaq1tomo in #139
• fix: new notion relation requires new properties by @brunoluiz in #143