Check if npm_lifecycle_script calls jest directly

[adityavohra7]

Summary
Fixes #4440. Check if npm_lifecycle_script calls jest directly because it's possible that projects wrap the invocation of jest with some script. If jest is called directly, the snapshot update command is something like yarn test -u (note: the -- has been removed). Else suggest people "re-run jest with -u".

I yarn link'ed jest-cli to my-app which has this package.json:

➜  my-app cat package.json
{
  "name": "my-app",
  "version": "0.1.0",
  "private": true,
  "dependencies": {
    "react": "^16.0.0",
    "react-dom": "^16.0.0"
  },
  "scripts": {
    "test-call-jest-indirectly": "./run-tests.sh",
    "test-call-jest-directly": "jest"
  },
  "devDependencies": {
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "jest": "^21.2.1",
    "react-test-renderer": "^16.0.0"
  }
}

where run-tests.sh is:

#!/usr/bin/env bash
jest

Running yarn test-call-jest-directly with failing snapshot tests yields:

...
 › 1 snapshot test failed in 1 test suite. Inspect your code changes or run `yarn run test-call-jest-directly -u` to update them.
...

Running yarn test-call-jest-indirectly with failing snapshot tests yields:

...
 › 1 snapshot test failed in 1 test suite. Inspect your code changes or re-run jest with `-u` to update them.
...

[codecov-io]

Codecov Report

Merging #4629 into master will decrease coverage by 0.2%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #4629      +/-   ##
==========================================
- Coverage   56.36%   56.15%   -0.21%     
==========================================
  Files         194      194              
  Lines        6559     6553       -6     
  Branches        3        3              
==========================================
- Hits         3697     3680      -17     
- Misses       2861     2872      +11     
  Partials        1        1

Impacted Files	Coverage Δ
...ackages/jest-cli/src/reporters/summary_reporter.js	8.33% <0%> (-0.15%)	⬇️
packages/jest-environment-jsdom/src/index.js	0% <0%> (-44.45%)	⬇️
packages/jest-util/src/fake_timers.js	90.95% <0%> (-0.1%)	⬇️
packages/jest-environment-node/src/index.js	63.15% <0%> (+0.65%)	⬆️

---

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[github-actions]

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