Add ComponentOptions type definition and update index.ts to use it

src/index.ts

@@ -1,11 +1,4 @@
-export default (options: {
+export default (options: ComponentOptions) => {
-	tag: string
-	template: string
-	style?: string
-	onMount?: () => void
-	onUnmount?: () => void
-	onAttributeChanged?: (attrName: string, oldValue: string, newValue: string) => void
-}) => {
 	const { tag, template, style, onMount, onUnmount, onAttributeChanged } = options
 
 	class CustomElement extends HTMLElement {

src/types/ComponentOptions.d.ts

@@ -0,0 +1,8 @@
+interface ComponentOptions {
+	tag: string
+	template: string
+	style?: string
+	onMount?: () => void
+	onUnmount?: () => void
+	onAttributeChanged?: (attrName: string, oldValue: string, newValue: string) => void
+}

tsconfig.json

@@ -32,7 +32,7 @@
     // "baseUrl": "./",                                  /* Specify the base directory to resolve non-relative module names. */
     // "paths": {},                                      /* Specify a set of entries that re-map imports to additional lookup locations. */
     // "rootDirs": [],                                   /* Allow multiple folders to be treated as one when resolving modules. */
-    // "typeRoots": [],                                  /* Specify multiple folders that act like './node_modules/@types'. */
+    "typeRoots": ["./src/types"],                                  /* Specify multiple folders that act like './node_modules/@types'. */
     // "types": [],                                      /* Specify type package names to be included without being referenced in a source file. */
     // "allowUmdGlobalAccess": true,                     /* Allow accessing UMD globals from modules. */
     // "moduleSuffixes": [],                             /* List of file name suffixes to search when resolving a module. */