Support caching for mono repos and repositories with complex structure

This release introduces dependency caching support for mono repos and repositories with complex structure (#305).

By default, the action searches for the dependency file (package-lock.json or yarn.lock) in the repository root. Use the cache-dependency-path input for cases when multiple dependency files are used, or they are located in different subdirectories. This input supports wildcards or a list of file names for caching multiple dependencies.

Yaml example:

steps:
- uses: actions/checkout@v2
- uses: actions/setup-node@v2
  with:
    node-version: 14
    cache: npm
    cache-dependency-path: 'sub-project/package-lock.json'

For more examples of using cache-dependency-path input, see the Advanced usage guide.