Added the CHANGELOG.md file.

CHANGELOG.md

@@ -0,0 +1,11 @@
+
+Who knows what the future holds...
+
+# 0.0.1 - 16/09/2022
+The first usable version of the crate, yay!  
+It brings:
+- Initial implementation of the [valve server query protocol](https://developer.valvesoftware.com/wiki/Server_queries).
+- Initial [Team Fortress 2](https://en.wikipedia.org/wiki/Team_Fortress_2) support.
+
+# 0.0.0 - 15/09/2022
+The first *markdown*, the crate is unusable as it doesn't contain anything helpful.

README.md

@@ -22,7 +22,8 @@ fn main() {
 To see more examples, see the [examples](examples) folder.
 
 # Documentation
-The documentation is available at [docs.rs](https://docs.rs/gamedig/latest/gamedig/).
+The documentation is available at [docs.rs](https://docs.rs/gamedig/latest/gamedig/).  
+Curious about the history and what changed between versions? you can see just that in the [CHANGELOG](CHANGELOG.md) file.
 
 # Games List
 To see the supported (or the planned to support) games, see [GAMES](GAMES.md).