Release 0.17.0

Released 2023-07-22.

• Added a check that no more than one of the http-types, mime02, or mime03 features are enabled (PR #124). Thanks @rustafarian-dev.
• Changed the writer type from W: &mut Write to just W: Write (PR #125). Thanks @kornelski!
• Fixed handling of MULTI_WORD_CONSTANTS in templates (Issue #129, PR #130). Thanks @wezm!
• More ways to create a working rust symbol name from a "strange" static file name. Illegal characters are replaced by _, and if the file name starts with a number it is prefixed with n (Issue #82, PR #132). Thanks @Aedius for reporting!
• Fixed more clippy lints (PR #123, #127). Thanks @vbrandl!
• Updated rsass to 0.28.0 and itertools to 0.11.0.