'await-promise' rule is not compatible with AxiosPromise

[stackia]

Bug Report

• TSLint version: 5.8.0
• TypeScript version: 2.5.3
• Running TSLint via: angelozerr/tslint-language-service

TypeScript code being linted

const res = await axios.get(`/users`)

with tslint.json configuration:

// other rules...
"await-promise": true

Actual behavior

AxiosPromise is inherited from Promise, but tslint gives ERROR Invalid 'await' of a non-Promise value.

Expected behavior

Types inherited from Promise should be recognized as normal promise.