major version bump due to dependency change.

now packaged with poetry.
added to pypi.

major version bump due to dependency change.

interface reworked to match the remote-api interface.

readme updated with changes to installation

pre-commit hook temporarily removed

vban_cmd/subject.py

@@ -0,0 +1,39 @@
+class Subject:
+    """Adds support for observers"""
+
+    def __init__(self):
+        """list of current observers"""
+
+        self._observers = list()
+
+    @property
+    def observers(self) -> list:
+        """returns the current observers"""
+
+        return self._observers
+
+    def notify(self, modifier=None, data=None):
+        """run callbacks on update"""
+
+        [o.on_update(modifier, data) for o in self._observers]
+
+    def add(self, observer):
+        """adds an observer to _observers"""
+
+        if observer not in self._observers:
+            self._observers.append(observer)
+        else:
+            print(f"Failed to add: {observer}")
+
+    def remove(self, observer):
+        """removes an observer from _observers"""
+
+        try:
+            self._observers.remove(observer)
+        except ValueError:
+            print(f"Failed to remove: {observer}")
+
+    def clear(self):
+        """clears the _observers list"""
+
+        self._observers.clear()