fix(types): use Partial type to set all parameters as optional

Closes #1

Author: Sherwin Heydarbeygi

README.md

@@ -23,7 +23,7 @@ This package was created on 15 Nov 2022, it is new but please give it a try and
 ```ts
 import type { ImgixUrl } from 'typescript-imgix-url-params';
 
-const params: Partial<ImgixUrl.Params> = {
+const params: ImgixUrl.Params = {
   w: 100,
   h: 100,
   fm: 'pjpg',

src/get-source.ts

@@ -68,7 +68,7 @@ function getParamsInterface(
     return [tsdoc, `'${key}': ${type};`].join('\n');
   });
 
-  return [`export interface ${name} {`, ...props, '}'].join('\n\n');
+  return [`export type ${name} = Partial<{`, ...props, '}>'].join('\n\n');
 }
 
 function getHexColorType(): string {