Testing different MSRV for specific feature

Cargo.toml

@@ -10,6 +10,7 @@ repository = "https://github.com/rusticata/x509-parser.git"
 categories = ["parser-implementations", "cryptography"]
 readme = "README.md"
 edition = "2018"
+rust-version = "1.57.0"
 
 include = [
   "CHANGELOG.md",
@@ -46,7 +47,10 @@ lazy_static = "1.4"
 nom = "7.0"
 oid-registry = { version="0.6", features=["crypto", "x509", "x962"] }
 rusticata-macros = "4.0"
-ring = { version="0.16.11", optional=true }
+ring = { version="0.17.7", optional=true }
 der-parser = { version = "8.1.0", features=["bigint"] }
 thiserror = "1.0.2"
 time = { version="0.3.7", features=["formatting"] }
+
+[target.'cfg(feature = "verify")'.package]
+rust-version = "1.61.0"