CB-13597: (ios) update podfile with ios version 9.0

[apare]

Since the release Cordova iOS 4.4.0, only iOS 9 and greater supported
https://cordova.apache.org/announcements/2017/04/26/ios-release.html

Platforms affected

• ios

What does this PR do?

• Upgrade the podfile ios version

What testing has been done on this change?

• install a pod dependency with only support ios 9 (Curbside 3.0.0.0)

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[codecov-io]

Codecov Report

Merging #349 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #349   +/-   ##
=======================================
  Coverage   63.45%   63.45%           
=======================================
  Files          14       14           
  Lines        1691     1691           
  Branches      284      284           
=======================================
  Hits         1073     1073           
  Misses        618      618

Impacted Files	Coverage Δ
bin/templates/scripts/cordova/lib/Podfile.js	77.41% <ø> (ø)	⬆️

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[apare]

travis error Version '6.11' not found - try nvm ls-remote to browse available versions.

[janpio]

I restarted the build on Travis - maybe it works this time.

[janpio]

That worked @apare.

[surajpindoria]

LGTM!