Update dependencies and pass all clippy's (#636)

* Cargo update

https://pastebin.com/raw/KWNuJD9u

* Cargo clippy +nightly

* Remove deprecated clippy

* Fix unbalanced backtick (now passes cargo {+nightly,} clippy)

emath/src/lib.rs

@@ -64,7 +64,6 @@
     clippy::option_option,
     clippy::path_buf_push_overwrite,
     clippy::ptr_as_ptr,
-    clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
     clippy::same_functions_in_if_condition,
@@ -79,7 +78,6 @@
     clippy::unused_self,
     clippy::useless_transmute,
     clippy::verbose_file_reads,
-    clippy::wrong_pub_self_convention,
     clippy::zero_sized_map_values,
     future_incompatible,
     nonstandard_style,

emath/src/rect.rs

@@ -334,7 +334,7 @@ impl Rect {
 
 /// ## Convenience functions (assumes origin is towards left top):
 impl Rect {
-    /// `min.x
+    /// `min.x`
     #[inline(always)]
     pub fn left(&self) -> f32 {
         self.min.x