v2.0.0-beta4

• #112 Get rid of Vue dependency in the code. (01fa81b)
• add fecha (4751917)
• add fecha instead of moment (dcaa273)
• add lodash babel plugin (8dce56d)
• Amend error message for vue-multi-select (dc0ace9)
• bump version (ede7fd8)
• fix dateTimePicker (53d3867)
• fix dev example (ecd812f)
• fix dev example (8be80aa)
• fix eslint restspread error (cc7a436)
• fix fieldImage url if undefined (d199677)
• fix model-changed event value (364a1ce)
• fix pikaday (e7589b3)
• fix unreactive model sets (again) (2bef826)
• handle null value (97213a8)
• remove skip from pikaday tests (39ce4c6)
• remove unused comment (8c47cf9)
• remove unused comments (c61ab6b)
• update datetimepicker version (d3faf1c)
• Update README.md (2095c08)
• Update README.md (b095166)
• update year (afe5e74)