Work around search not updating the index

discussion in rust-lang/cargo#3377 (comment)
proper fix in rust-lang/cargo#5961

Author: Eh2406

src/toolchain.rs

@@ -155,7 +155,10 @@ impl Toolchain {
         // This nop cargo command is to update the registry
         // so we don't have to do it for each crate.
         let toolchain_arg = "+".to_string() + &self.rustup_name();
-        let full_args = [&toolchain_arg, "search", "lazy_static"];
+        // using `install` is a temporary solution until
+        // https://github.com/rust-lang/cargo/pull/5961
+        // is ready
+        let full_args = [&toolchain_arg, "install", "lazy_static"];
         RunCommand::new(&installed_binary("cargo"), &full_args)
             .local_rustup()
             .quiet(true)