fix: regex flags in dependency were breaking Node 8

Author: Benjamin E. Coe

lib/report.js

@@ -6,7 +6,6 @@ const reports = require('istanbul-reports')
 const { readdirSync, readFileSync } = require('fs')
 const { isAbsolute, resolve } = require('path')
 // TODO: switch back to @c88/v8-coverage once patch is landed.
-const { mergeProcessCovs } = require('@bcoe/v8-coverage')
 const v8toIstanbul = require('v8-to-istanbul')
 const isCjsEsmBridgeCov = require('./is-cjs-esm-bridge')
 
@@ -138,6 +137,7 @@ class Report {
    * @private
    */
   _getMergedProcessCov () {
+    const { mergeProcessCovs } = require('@bcoe/v8-coverage')
     const v8ProcessCovs = []
     for (const v8ProcessCov of this._loadReports()) {
       if (this._isCoverageObject(v8ProcessCov)) {