Add power-assert enabled t.assert() assertion; remove from others

[eemed]

Initial for #1808 . I still have those 3 failing tests but could you @novemberborn take a look at this first.
I moved these functions away from enhanced assert.

• t.truthy()
• t.falsy()
• t.true()
• t.false()
• t.regex()
• t.notRegex()

Added a new function t.assert() to enhanced assert and copied over the t.truthy() tests.
Then I tried to update the tests that kept failing. I also updated the patterns in babel-preset-transform-test-files.

[novemberborn]

Looks good @eemed. Will you make the PR for https://github.com/avajs/babel-preset-transform-test-files/blob/master/espower-patterns.json?

We'll have to update the documentation as well.

To update the reporter tests you can run UPDATE_REPORTER_LOG=1 npx tap --no-cov test/reporters/*.js.

[eemed]

Updated tests and used .assert() in the test case. PR for babel-preset-transform-files is here.

[novemberborn]

Looks great @eemed. Would you want to have a stab at updating the documentation?

[eemed]

I can take a look. Do I just commit doc updates to this pr aswell?

[novemberborn]

Do I just commit doc updates to this pr aswell?

Yep!

[eemed]

I'm not sure if there's more updating to be done. I tried to look through all the files but didn't find anything else.

[novemberborn]

@eemed I've pushed some documentation updates, let me know what you think.

Let's hold off merging until we can address avajs/eslint-plugin-ava#218. Perhaps you'd like to tackle that one too? 😄

[eemed]

I can take a look at it next weekend.