Bump rust-version to 1.70 and use the workspace one in xtask

Author: lnicola

Cargo.toml

@@ -4,7 +4,7 @@ exclude = ["crates/proc-macro-test/imp"]
 resolver = "2"
 
 [workspace.package]
-rust-version = "1.66"
+rust-version = "1.70"
 edition = "2021"
 license = "MIT OR Apache-2.0"
 authors = ["rust-analyzer team"]

xtask/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 publish = false
 license = "MIT OR Apache-2.0"
 edition = "2021"
-rust-version = "1.65"
+rust-version.workspace = true
 
 [dependencies]
 anyhow = "1.0.62"