perf: disable mangle and remove entities package for decoding

By disabling mangle from marked.js we don't need to do entities
decode. This will improve the performance and reduce the package
size.

As a side-effect we need to enable github flavoured markdown to
support some additional emphasis.

Author: gmsgowtham

package.json

@@ -199,7 +199,6 @@
   "dependencies": {
     "@jsamr/counter-style": "^2.0.2",
     "@jsamr/react-native-li": "^2.3.1",
-    "entities": "^4.4.0",
     "marked": "^4.0.18",
     "react-native-fit-image": "^1.5.5"
   }

src/lib/Markdown.tsx

@@ -20,7 +20,10 @@ const Markdown = ({
     const parser = new Parser({
       styles,
     });
-    const tokens = marked.lexer(value);
+    const tokens = marked.lexer(value, {
+      mangle: false,
+      gfm: true,
+    });
 
     return parser.parse(tokens);
   }, [value, styles]);

src/lib/Parser.tsx

@@ -1,7 +1,6 @@
 import type { ReactNode } from 'react';
 import type { TextStyle, ViewStyle, ImageStyle } from 'react-native';
 import type { marked } from 'marked';
-import { decode } from 'entities';
 import Renderer from './Renderer';
 import type { MarkedStyles } from '../theme/types';
 import type { ParserOptions } from './types';
@@ -172,7 +171,7 @@ class Parser {
         }
         case 'text':
         case 'html': {
-          return this.renderer.getTextNode(decode(token.raw), {
+          return this.renderer.getTextNode(token.raw, {
             ...this.styles.text,
             ...styles,
           });