Added company json file validation using Cerberus

[aniketshirodkar]

1) Added Cerberus as a dependency 2) Created schema company json files should follow 3) Checked each company json against schema before scraping

[johndpjr]

@aniketshirodkar Also make sure that the tests are passing. There were some formatting issues (which can be corrected with pre-commit). Here are the details as to why the build failed. You'll need to install pre-commit and run it on these files. LMK if you need help