expose: allow setting the label for Lock()

For devices with multiple locks or for devices that have a lock function, allow setting of a label.
e.g. for TRV's with a keypad_lockout it is now called keypad_lockout instead of state which is confusing if there are multiple switches/locks all called 'state'

lib/exposes.js

@@ -84,13 +84,13 @@ class Lock extends Base {
 
     withState(property, valueOn, valueOff, description, access=a.ALL) {
         assert(!this.endpoint, 'Cannot add feature after adding endpoint');
-        this.features.push(new Binary('state', access, valueOn, valueOff).withProperty(property).withDescription(description));
+        this.features.push(new Binary(property, access, valueOn, valueOff).withProperty(property).withDescription(description));
         return this;
     }
 
     withLockState(property, description) {
         assert(!this.endpoint, 'Cannot add feature after adding endpoint');
-        this.features.push(new Enum('lock_state', access.STATE, ['not_fully_locked', 'locked', 'unlocked']).withProperty(property).withDescription(description));
+        this.features.push(new Enum(property, access.STATE, ['not_fully_locked', 'locked', 'unlocked']).withProperty(property).withDescription(description));
         return this;
     }
 }