chore: update the target compiler version to nightly-2021-01-30

yvt · yvt · commit 21bb3a0dacd9 · 2021-01-31T03:16:22.000+09:00
diff --git a/rust-toolchain b/rust-toolchain
@@ -1 +1 @@
-nightly-2020-12-15
+nightly-2021-01-30
