Add type annotations

pyscriptjs/src/utils.ts

@@ -4,11 +4,11 @@ function addClasses(element: HTMLElement, classes: Array<string>) {
     }
 }
 
-const getLastPath = function (str) {
+function getLastPath(str: string): string {
     return str.split('\\').pop().split('/').pop();
-};
+}
 
-function htmlDecode(input) {
+function htmlDecode(input: string): string {
     const doc = new DOMParser().parseFromString(ltrim(input), 'text/html');
     return doc.documentElement.textContent;
 }