add missing awaits

Author: bcoe

Diff for: lib/commands/check-coverage.js

@@ -25,14 +25,14 @@ exports.handler = function (argv) {
   exports.checkCoverages(argv, report)
 }
 
-exports.checkCoverages = function (argv, report) {
+exports.checkCoverages = async function (argv, report) {
   const thresholds = {
     lines: argv.lines,
     functions: argv.functions,
     branches: argv.branches,
     statements: argv.statements
   }
-  const map = report.getCoverageMapFromAllCoverageFiles()
+  const map = await report.getCoverageMapFromAllCoverageFiles()
   if (argv.perFile) {
     map.files().forEach(file => {
       checkCoverage(map.fileCoverageFor(file).toSummary(), thresholds, file)