Setup test environment and test conferences

[EhsanZ]

1. Setup jest framework.
2. Test conferences by: a. For each English & Arabic files, assure that conferences is an Array. b. Assure that every element in this array is a valid Object. c. Assure that every object has these properties identifier, name, description, date. d. Assure that the number of English & Arabic conferences are identical. e. Assure that each conference has both an Arabic and English entry.

• [x] Have you made sure to run yarn format on your code?

[obahareth]

Thanks @EhsanZ, I removed the Fixes #4 because we still need to check that the Twitter accounts and websites actually exist in that issue too, as well as test conferences.