Increase DEFAULT_MAX_AGE in LibYearExtension.kt

[JP95Git]

The default validator uses DEFAULT_MAX_AGE with 10 years.

Running gradlew reportLibyears for a project with very old dependencies, the build fail and no report is generated:

Task :reportLibyears FAILED
Too many libyears encountered! These are the main culprits:

10 years sound much, but this can be reached very fast by having multiple dependencies. Perhaps we can increase the DEFAULT_MAX_AGE to something like 1000 years or do not use an validator per default.

Tested version 0.2 with Gradle 8.10

[Breefield]

+1 to do not use an validator per default

[JP95Git]

#13 seems to be related to this issue.