Specify versionize deps via caret requirements

Signed-off-by: Patrick Roy <[email protected]>

Author: roypat

Cargo.toml

@@ -14,5 +14,5 @@ fam-wrappers = ["vmm-sys-util"]
 [dependencies]
 vmm-sys-util = { version = "0.11.0", optional = true }
 
-versionize = { version = ">=0.1.6" }
-versionize_derive = { version = ">=0.1.3" }
+versionize = { version = "0.1.6" }
+versionize_derive = { version = "0.1.3" }