Can not marge the mocha report which genrated in parallel test

[wenJanus]

Describe the bug
A clear and concise description of what the bug is.
When marge the repot file which generate by parallel test output, show some error:
suites._timeout should be number
beforeHooks/0/pending: Boolean

Code Reproduce
Link to repo where the issue can reliably be reproduced:

Expected behavior
Run command line:
marge /project/reports/test/index.json --reportDir /project/reports/test --inline

Result:
18:04:17 + marge /project/reports/test/index.json --reportDir /project/reports/test --inline
18:04:17 Start to generate *** Test HTML Report.
18:04:17
18:04:17 ✘ Some files could not be processed:
18:04:17 /project/reports/test/index.json
18:04:17 Invalid value null supplied to /results/1/suites/0/_timeout: Number
18:04:17 Invalid value null supplied to /results/1/suites/0/beforeHooks/0/pending: Boolean
18:04:17 Invalid value null supplied to /results/1/suites/0/afterHooks/0/pending: Boolean
18:04:17 Invalid value null supplied to /results/1/suites/1/_timeout: Number
18:04:17 Invalid value null supplied to /results/1/suites/2/_timeout: Number

cat index.json | grep "_timeout"
"_timeout": 120000
"_timeout": 2000
"_timeout": null
"_timeout": null
"_timeout": null
"_timeout": null
"_timeout": null
"_timeout": null
"_timeout": null

cat index.json | grep "pending"
"pending": 0,
"pendingPercent": 0,
"pending": false,
"pending": false,
"pending": false,
"pending": false,
"pending": false,
"pending": [],
"pending": [],
"pending": null,
"pending": null,
"pending": false,
"pending": false,

Screenshots
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Environment (please complete the following information):

• Platform: Linux, docker
• mochawesome version: 7.1.3
• mocha (or other test library) version: 8.3.0
• Node version: >=12.17.0

Additional context
Add any other context about the problem here.