v0.1.9

• hotfix to prevent docs.rs build failure https://docs.rs/crate/docify/0.1.8/builds/823704
• docs.rs uses a read-only file system, so docify will now only overwrite a file if the new content will actually be different than the original content, allowing for things like dynamically generated README.md files, as long as both the template and the output file are tracked in the git repo