chore: Update Cordova engine version requirements in plugin.xml

[jcesarmobile]

the cordova and cordova-ios versions and comment are based on 0cdd7be#diff-6813833f33103dfcaa583d4f09e06dc84c0ce8ddd34c8b567b56c9728be58389

The comments on both were wrong since the version 8 requirement was removed when the package name was changed from @sentry/cordova to sentry-cordova, so 8 is no longer required. And for cordova-ios it was out of date as it wasn't updated when the version was bumped.

For the cordova-android version, the comment is correct, maven libraries support was added in cordova-android 4.0.0, but it was set to 3.5.0, probably by mistake, not sure if changing the version requirement could be considered a breaking change, but those are ancient versions anyway that nobody should be using nowadays.

Changed that uses gradle to that uses Maven libraries to be more clear about what it means, it means it started adding the sentry maven dependency using the framework tag like this: <framework src="io.sentry:sentry-android:1+" />

[lucas-zimerman]

@jcesarmobile thank you for the PR!
would you say that everyone should be using cordova-android version 14 onwards/ cordova-ios 7.x onwards since they are the minimum required versions to publish an app?

[jcesarmobile]

I always recommend using latest versions, specially if submitting to the stores, but not everybody submits to the stores and could need to use an older version because of incompatibilities with older plugins.

[lucas-zimerman]

Thank you for the update, I won't consider it as a break change since those versions are 12 years older and likely not supported anymore.
I will consider a bump on them in the future for a major version
At any case, thank you for the PR!