[items] Fix sendCommandIfDifferent fails for Dimmer/Number Items with string commands (#421)

Fixes #410.

Signed-off-by: Florian Hotze <[email protected]>

Author: florian-h05

Diff for: src/items/items.js

@@ -261,6 +261,13 @@ class Item {
       }
     }
 
+    // value is number as string and current state is numeric and both are equal
+    if (typeof value === 'string' && !isNaN(value) && this.numericState !== null) {
+      if (parseFloat(value) === this.numericState) {
+        return false;
+      }
+    }
+
     // stringified value and string state are equal
     value = _toOpenhabPrimitiveType(value);
     if (value.toString() === this.state) {

Diff for: types/rules/operation-builder.d.ts

@@ -33,7 +33,7 @@ export type Item = {
     sendCommandIfDifferent(value: any): boolean;
     sendIncreaseCommand(value: any): boolean;
     sendDecreaseCommand(value: any): boolean;
-    getToggleState(): "PAUSE" | "PLAY" | "OPEN" | "CLOSED" | "ON" | "OFF"; /** @private */
+    getToggleState(): "PAUSE" | "PLAY" | "OPEN" | "CLOSED" | "ON" | "OFF";
     sendToggleCommand(): void;
     postToggleUpdate(): void;
     postUpdate(value: any): void;