config: Do not expose protocol primitives

It doesn't look like a good idea to do this because of potential
complications (and, why'd we want to allow it anyway?)

CHANGELOG.md

@@ -2,12 +2,12 @@
 
 All changes in this project will be noted in this file.
 
-### 0.9.0 (unreleased)
+### 0.8.7 (unreleased)
 
+> **BREAKING PATCH DUE TO MINIMUM VERSION UPGRADE**
 > - **Minimum Supported Skytable Version**: 0.8.2
 > - **Field change warnings**:
->   - The `Config` struct now has two additional fields. This is not a breaking change because the functionality of the library remains unchanged
-
+>   - The `Config` struct now has one additional field. This is not a breaking change because the functionality of the library remains unchanged
 - Added support for pipelines
 
 ### 0.8.6

src/config.rs

@@ -30,7 +30,7 @@
 //! let mut db = Config::new("subnetx2_db1", 2008, "username", "password").connect().unwrap();
 //! ```
 
-pub use crate::protocol::handshake::ProtocolVersion;
+use crate::protocol::handshake::ProtocolVersion;
 
 /// The default host
 ///
@@ -48,8 +48,7 @@ pub struct Config {
     port: u16,
     username: Box<str>,
     password: Box<str>,
-    protocol: ProtocolVersion,
-    pub(crate) protocol_changed: bool,
+    pub(crate) protocol: ProtocolVersion,
 }
 
 impl Config {
@@ -66,7 +65,6 @@ impl Config {
             username,
             password,
             protocol,
-            protocol_changed: false,
         }
     }
     /// Create a new [`Config`] using the default connection settings and using the provided username and password
@@ -101,13 +99,4 @@ impl Config {
     pub fn password(&self) -> &str {
         self.password.as_ref()
     }
-    /// Set the protocol
-    pub fn set_protocol(&mut self, protocol: ProtocolVersion) {
-        self.protocol_changed = true;
-        self.protocol = protocol;
-    }
-    /// Returns the protocol used for connections
-    pub fn protocol(&self) -> ProtocolVersion {
-        self.protocol
-    }
 }

src/protocol/handshake.rs

@@ -22,7 +22,7 @@ use crate::{
 #[derive(Debug, PartialEq, Clone, Copy)]
 #[repr(u8)]
 /// The Skyhash protocol version
-pub enum ProtocolVersion {
+pub(crate) enum ProtocolVersion {
     /// Skyhash 2.0
     V2_0,
 }
@@ -38,7 +38,7 @@ impl ProtocolVersion {
 pub struct ClientHandshake(Box<[u8]>);
 impl ClientHandshake {
     pub(crate) fn new(cfg: &Config) -> Self {
-        Self::_new(cfg.protocol().hs_block(), cfg)
+        Self::_new(cfg.protocol.hs_block(), cfg)
     }
     fn _new(hs: [u8; 6], cfg: &Config) -> Self {
         let mut v = Vec::with_capacity(6 + cfg.username().len() + cfg.password().len() + 5);