add(laucnher|update): add bot.version and --update

cogs/utils/version.py

@@ -0,0 +1,12 @@
+class Version:
+    def __init__(self, major: int, minor: int, patch: int, **kwargs):
+        self.major: int = major
+        self.minor: int = minor
+        self.patch: int = patch
+
+        self.pre_release = kwargs.get('pre_release', '')
+        self.build = kwargs.get('build', '')
+
+    def __str__(self) -> str:
+        build = self.build[:10]
+        return f'v{self.major}.{self.minor}.{self.patch}{self.pre_release}-{build}'