Rustup to rustc 1.59.0-nightly (78fd0f633 2021-12-29)

bjorn3 · bjorn3 · commit a2c8e86ef75a · 2021-12-30T15:29:58.000+01:00
diff --git a/rust-toolchain b/rust-toolchain
@@ -1 +1 @@
-nightly-2021-10-30
+nightly-2021-12-30
