First attept to test DPT13.

src/DPT13.ts

@@ -31,7 +31,7 @@ export class DPT13 implements DPT {
    */
   encoder(value: number): Buffer {
 
-    if (value === undefined || value === null || Number.isFinite(value))
+    if (value === undefined || value === null || !Number.isFinite(value))
       throw new InvalidValueError(`Value is not viable`)
     if (Number.isInteger(value))
       throw new InvalidValueError(`Value ${value} is not an integer`)