fix shadowdom polyfill

pkg/shadow_dom/lib/shadow_dom.min.js

-if(!HTMLElement.prototype.createShadowRoot&&!HTMLElement.prototype.webkitCreateShadowRoot||window.__forceShadowDomPolyfill){!function(){Element.prototype.webkitCreateShadowRoot&&(Element.prototype.webkitCreateShadowRoot=function(){return window.ShadowDOMPolyfill.wrapIfNeeded(this).createShadowRoot()})}();var SideTable;"undefined"!=typeof WeakMap&&navigator.userAgent.indexOf("Firefox/")<0?SideTable=WeakMap:!function(){var a=Object.defineProperty,b=Date.now()%1e9;SideTable=function(){this.name="__st"+(1e9*Math.random()>>>0)+(b++ +"__")},SideTable.prototype={set:function(b,c){var d=b[this.name];d&&d[0]===b?d[1]=c:a(b,this.name,{value:[b,c],writable:!0})},get:function(a){var b;return(b=a[this.name])&&b[0]===a?b[1]:void 0},"delete":function(a){this.set(a,void 0)}}}();var ShadowDOMPolyfill={};!function(a){"use strict";function b(a){if(!a)throw new Error("Assertion failed")}function c(a,b){return 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this.impl[e]},(f.writable||f.set)&&(j=k?a.getEventHandlerSetter(e):function(a){this.impl[e]=a}),Object.defineProperty(c,e,{get:h,set:j,configurable:f.configurable,enumerable:f.enumerable})}})}function k(a,b,c){var e=a.prototype;l(e,b,c),d(b,a)}function l(a,c,d){var e=c.prototype;b(void 0===A.get(a)),A.set(a,c),B.set(e,a),g(a,e),d&&h(e,d)}function m(a,b){return A.get(b.prototype)===a}function n(a){var b=Object.getPrototypeOf(a),c=f(b),d=o(c);return l(b,d,a),d}function o(a){function b(b){a.call(this,b)}return b.prototype=Object.create(a.prototype),b.prototype.constructor=b,b}function p(a){return a instanceof C.EventTarget||a instanceof C.Event||a instanceof C.Range||a instanceof C.DOMImplementation}function q(a){return a instanceof H||a instanceof G||a instanceof I||a instanceof J||a instanceof F}function r(a){if(null===a)return null;b(q(a));var c=z.get(a);return c||z.set(a,c=new(f(a))(a)),c}function s(a){return null===a?null:(b(p(a)),a.impl)}function t(a){return a&&p(a)?s(a):a}function 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b(a){return a instanceof N.ShadowRoot}function c(a){var b=a.localName;return"content"===b||"shadow"===b}function d(a){return!!a.shadowRoot}function e(a){var b;return a.parentNode||(b=a.defaultView)&&M(b)||null}function f(f,g,h){if(h.length)return h.shift();if(b(f))return j(f)||a.getHostForShadowRoot(f);var i=a.eventParentsTable.get(f);if(i){for(var k=1;k<i.length;k++)h[k-1]=i[k];return i[0]}if(g&&c(f)){var l=f.parentNode;if(l&&d(l))for(var m=a.getShadowTrees(l),n=j(g),k=0;k<m.length;k++)if(m[k].contains(n))return n}return e(f)}function g(a){for(var d=[],e=a,g=[],i=[];e;){var j=null;if(c(e)){j=h(d);var k=d[d.length-1]||e;d.push(k)}else d.length||d.push(e);var l=d[d.length-1];g.push({target:l,currentTarget:e}),b(e)&&d.pop(),e=f(e,j,i)}return g}function h(a){for(var b=a.length-1;b>=0;b--)if(!c(a[b]))return a[b];return null}function i(d,e){for(var g=[];d;){for(var i=[],j=e,l=void 0;j;){var n=null;if(i.length){if(c(j)&&(n=h(i),k(l))){var o=i[i.length-1];i.push(o)}}else 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