jest 14.0.0

• Official release of snapshot tests.
• Started to replace Jasmine matchers with Jest matchers: toBe, toBeFalsy, toBeTruthy, toBeNaN, toBe{Greater,Less}Than{,OrEqual}, toBeNull, toBeDefined, toBeUndefined, toContain, toMatch, toBeCloseTo were rewritten.
• Rewrite of Jest's reporters.
• Experimental react-native support.
• Removed Jasmine 1 support from Jest.
• Transform caching improvements.