use rust nightly

Author: ReenigneArcher

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
         with:
           command: |
             cargo install cargo2junit cargo-tarpaulin
-            cargo tarpaulin --engine llvm --out Xml -Z unstable-options -- --format json > results.json
+            cargo +nightly tarpaulin --engine llvm --out Xml -Z unstable-options -- --format json > results.json
             cat results.json | cargo2junit > junit.xml
 
             # debug junit.xml

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.85.0"
+channel = "nightly"