ignore-precise

[WillSquire]

Related issue to #99, except it would be handy to ignore Jest's global functions with precise matches instead. Using the following implementation in tslint.json at the moment:

"no-expression-statement": [
  true,
  {
    "ignore-prefix": [
      "afterAll",
      "afterEach",
      "beforeAll",
      "beforeEach",
      "describe",
      "expect",
      "test",
      "wrapper"
    ] // ignore jest
  }
]

Jest's "it" function was also on the list (shorthand for the test function), however it had to be removed due to the amount of names it could affect. ignore-precise would certainly make code less verbose in this use case.

EDIT: Included a more complete set of functions

[RebeccaStevens]

Closed via #137