Add key prop to fix error with multiple pdf pages

[cmwint]

This commit will fix the Missing keys on iterators issue here: #73

[pg-infosec]

Vulnerable Package: webpack-dev-server
Affected Range: < 3.1.11
Fixed Version: 3.1.11
Related CVE: CVE-2018-14732
Severity: LOW

More Information: Please consider upgrading webpack-dev-server to prevent deploying vulnerable code into production. For more information, visit: https://nvd.nist.gov/vuln/detail/CVE-2018-14732, or visit the FAQ

[pg-infosec]

Vulnerable Package: eslint
Affected Range: < 4.18.2
Fixed Version: 4.18.2
Related CVE: WS-2018-0592
Severity: MODERATE

More Information: Please consider upgrading eslint to prevent deploying vulnerable code into production. For more information, visit: eslint/eslint@f6901d0, or visit the FAQ

[cmwint]

@aaronnorby @aschiopu @viktoriyavulfson is anyone available to review this and merge, please? I think it would benefit many people using this library! Thank you.

[aaronnorby]

@cmwint I'm no longer a maintainer on this project and can't merge things - sorry

[cmwint]

@aschiopu @viktoriyavulfson can someone please review this small change and approve? I appreciate your time and this package!

[viktoriyavulfson]

@cmwint Unfortunately, I'm no longer a maintainer on this project as well.

[cmwint]

@aschiopu are you still a maintainer of this project? Or is there another person I can ask, please?

[apennell]

@cmwint Hey make it count for Hacktoberfest! Maybe @michaelwolo is still a maintainer?

[michaelwolo]

👍

[apennell]

🙌

[akhilaudable]

It's merged on OCT 5th. I installed this library yesterday. Why I still see the error warning?

[SalmanHaider5]

Still issue is there, if anyone there to maintain it please do it first, its a really good package.

[bsell93]

Looks like the changes were undone in
78f1581#diff-227f34f5a8fb440046daea8d13f0c149

[AIPB07]

@michaelwolo are you still a maintainer? Would you be able to approve a pull request to fix this?