fix: missing module declaration, dependencies and some typing

Author: sharevb

pnpm-lock.yaml

@@ -0,0 +1,25 @@
+declare module 'image-to-ascii-art' {
+    interface ConfigInterface {
+        // the integer of pixels drawn on the canvas.
+        // it sets bigger,the generated ascii art will be more detailed.
+        // it has two type to set:
+        //    1. (0, 1] decimal.result is that this number multiplied by the number of pixels in the original image
+        //    2. An integer greater than 1.
+        drawWidth?: number;
+        drawHeight?: number;
+        // the integer that pick one for every how many pixels.
+        // it must be an integer greater than 0.
+        pickDensityHorizontal?: number;
+        pickDensityVertical?: number;
+        // set the char of every grey range.
+        greyRangeChar?: GreyRangeChar[];
+        // if a grey value can't match one of the 'greyRangeChar' config,use this char.
+        defaultGreyChar?: string;
+    }
+
+    class ImageToAsciiArt {
+        constructor({ canvas, config = {} }: { canvas?: HTMLCanvasElement; config?: ConfigInterface } = {})
+        public convert(image: string | HTMLImageElement): Promise<string>
+        public destroy(): void
+    }
+}

src/tools/image-to-ascii-art/image-to-ascii-art.d.ts

@@ -1,12 +1,13 @@
 function escapeXml(unsafe: string) {
-  return unsafe.replace(/[<>&'"]/g, (c: string | undefined) => {
+  return unsafe.replace(/[<>&'"]/g, (c: string) => {
     switch (c) {
       case '<': return '&lt;';
       case '>': return '&gt;';
       case '&': return '&amp;';
       case '\'': return '&apos;';
       case '"': return '&quot;';
     }
+    return c;
   });
 }