bump jest and make tests pass

node_modules/istanbul-reports/lib/lcov/index.js

@@ -1,13 +1,18 @@
+'use strict';
 /*
  Copyright 2012-2015, Yahoo Inc.
  Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
  */
+const { ReportBase } = require('istanbul-lib-report');
 const LcovOnlyReport = require('../lcovonly');
 const HtmlReport = require('../html');
 
-function LcovReport() {
-    this.lcov = new LcovOnlyReport({ file: 'lcov.info' });
-    this.html = new HtmlReport({ subdir: 'lcov-report' });
+class LcovReport extends ReportBase {
+    constructor(opts) {
+        super();
+        this.lcov = new LcovOnlyReport({ file: 'lcov.info', ...opts });
+        this.html = new HtmlReport({ subdir: 'lcov-report' });
+    }
 }
 
 ['Start', 'End', 'Summary', 'SummaryEnd', 'Detail'].forEach(what => {