bump libraries to DOMpurify 3.0.8 & zlib 1.3.1, increase compression level to 9

js/common.js

@@ -12,12 +12,12 @@ global.WebCrypto = require('@peculiar/webcrypto').Crypto;
 // application libraries to test
 global.$ = global.jQuery = require('./jquery-3.7.0');
 global.RawDeflate = require('./rawinflate-0.3').RawDeflate;
-global.zlib = require('./zlib-1.3').zlib;
+global.zlib = require('./zlib-1.3.1').zlib;
 require('./prettify');
 global.prettyPrint = window.PR.prettyPrint;
 global.prettyPrintOne = window.PR.prettyPrintOne;
 global.showdown = require('./showdown-2.1.0');
-global.DOMPurify = require('./purify-3.0.6');
+global.DOMPurify = require('./purify-3.0.8');
 global.baseX = require('./base-x-4.0.0').baseX;
 global.Legacy = require('./legacy').Legacy;
 require('./bootstrap-3.4.1');
@@ -151,4 +151,4 @@ exports.urlToString = function (url) {
     return url.schema + '://' + url.address.join('') + '/' + (url.query ? '?' +
         encodeURI(url.query.join('').replace(/^&+|&+$/gm,'')) : '') +
         (url.fragment ? '#' + encodeURI(url.fragment) : '');
-};
+};

js/zlib-1.3.1.js

@@ -6,7 +6,7 @@
     async function initialize() {
         if (ret) return ret;
 
-        const COMPRESSION_LEVEL = 7;
+        const COMPRESSION_LEVEL = 9;
         const NO_ZLIB_HEADER = -1;
         const CHUNK_SIZE = 32 * 1024;
         const map = {};