Cache the semver compatibility checks

[mikrostew]

Simple cache for the multiple semver checks that can be done. This improves the build speed for our app and prevents some recent regressions.

[chriseppstein]

cherry picked to current release as cd6d54b8d9a988c67f5fbadbb27a3b9afa256858

[chriseppstein]

Thank you for the patches!

Released as dist-tag v2:

• broccoli-eyeglass@5.5.1
• ember-cli-eyeglass@6.5.1
• eyeglass@2.5.1

Released as dist-tag current:

• broccoli-eyeglass@6.0.1
• ember-cli-eyeglass@7.0.1
• eyeglass@3.0.1