Bump nightly version -> 2021-09-28

Author: flip1995

clippy_lints/src/lib.rs

@@ -1961,7 +1961,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
     store.register_late_pass(|| Box::new(empty_enum::EmptyEnum));
     store.register_late_pass(|| Box::new(absurd_extreme_comparisons::AbsurdExtremeComparisons));
     store.register_late_pass(|| Box::new(invalid_upcast_comparisons::InvalidUpcastComparisons));
-    store.register_late_pass(|| Box::new(regex::Regex::default()));
+    store.register_late_pass(|| Box::new(regex::Regex));
     store.register_late_pass(|| Box::new(copies::CopyAndPaste));
     store.register_late_pass(|| Box::new(copy_iterator::CopyIterator));
     store.register_late_pass(|| Box::new(format::UselessFormat));

rust-toolchain

@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2021-09-08"
+channel = "nightly-2021-09-28"
 components = ["llvm-tools-preview", "rustc-dev", "rust-src"]