update min core version

Author: t-aleksander

src/lib.rs

@@ -17,4 +17,4 @@ pub(crate) mod proto {
 extern crate tracing;
 
 pub static VERSION: &str = concat!(env!("CARGO_PKG_VERSION"), "+", env!("VERGEN_GIT_SHA"));
-pub const MIN_CORE_VERSION: Version = Version::new(1, 5, 0);
+pub const MIN_CORE_VERSION: Version = Version::new(1, 6, 0);