feat: add steps to number input to support float

src/lib/elements/forms/inputNumber.svelte

@@ -13,6 +13,7 @@
     export let autofocus = false;
     export let maxlength: number = null;
     export let minlength: number = null;
+    export let step: number | 'any' = 1;
 
     let element: HTMLInputElement;
 
@@ -34,6 +35,7 @@
             {minlength}
             {maxlength}
             {readonly}
+            {step}
             type="number"
             class="input-text"
             bind:value