V9 hammerjs migration fails if project does not have `dependencies` in package.json

[splincode]

Reproduction

Angular 8

If i have

{
  "devDependencies": {
    "hammerjs": "..."
  }
}

instead

{
  "dependencies": {
    "hammerjs": "..."
  }
}

and run ng update I have error

❯ Updates Angular Material to v9
    
    ⚠  General notice: The HammerJS v9 migration for Angular Components is not able to migrate tests.
Cannot read property 'hammerjs' of undefined
✖ Migration failed. See above for further details.

Environment

• Angular:
• CDK/Material: 8.0

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