[bugfix] Prevent is-rfc268-test to be treated as a test

[ro0gr]

From Slack:

is-rfc268-test.js:4 Uncaught TypeError: Object.defineProperty called on non-object

so this happens with 1.15 betas only when trying to import useNativeEvents from the ember-cli-page-object/extend.

I don't fully understand the root cause of the issue, but here are my observations:

• extend/index.js depends on -private/execution_context
• which depends on -private/is-rfc268-test which causes an issue acording to error message
• Somehow when -private/is-rfc268-test is referenced via this depency chain out of the test execution context(for example in the tests/test-helper.js) we get an error above. if I rename the -private/is-rfc268-test to avoid the "-test.js" suffix an error dissapears.

It could possible fix the other imports issues I have heard about earlier..

I think there are pretty low chances to test it on CI cause we need an external app/addon to include ember-cli-page-object for that.

[coveralls]

Coverage remained the same at 98.763% when pulling 3b872fb on is-rfc268--test into aaec068 on master.

[mydea]

Any chance of getting a new release? Would be great :)

[ro0gr]

@mydea thanks for heads up! Going to make new beta release early this week.

[ro0gr]

Just published 1.15.0-beta.4, hoping to have a stable release soon.