Testing new darwin x64 Cypress version 4.6.0 a2c0bc3

```json
{
  "platform": "darwin",
  "arch": "x64",
  "env": {
    "CYPRESS_INSTALL_BINARY": "https://cdn.cypress.io/beta/binary/4.6.0/darwin-x64/circle-develop-a2c0bc3e3e662b3bd2dde389e016a254a7f77058-327008/cypress.zip"
  },
  "packages": "https://cdn.cypress.io/beta/npm/4.6.0/circle-develop-a2c0bc3e3e662b3bd2dde389e016a254a7f77058-326977/cypress.tgz",
  "branch": "4.6.0",
  "commit": "a2c0bc3e3e662b3bd2dde389e016a254a7f77058",
  "status": {
    "owner": "cypress-io",
    "repo": "cypress",
    "sha": "a2c0bc3e3e662b3bd2dde389e016a254a7f77058",
    "platform": "darwin",
    "arch": "x64",
    "context": "[darwin-x64] cypress-test-example-repos"
  }
}
```

Use tool `@cypress/commit-message-install` to install from above block

CircleCI job url: https://circleci.com/gh/cypress-io/cypress/327014