Architectural change

[yeojz]

• Switch main bundler to rollup
• Switch test to jest
• Cleanup build and deploy scripts
• v2 files are finally deprecated

[coveralls]

Coverage increased (+0.5%) to 100.0% when pulling 6e467e4 on feature/refactor-builds into dd22130 on master.

[coveralls]

Coverage increased (+0.5%) to 100.0% when pulling 35abc7a on feature/refactor-builds into dd22130 on master.

[coveralls]

Coverage increased (+0.5%) to 100.0% when pulling 4e034ad on feature/refactor-builds into dd22130 on master.

[coveralls]

Coverage increased (+0.5%) to 100.0% when pulling 04c8551 on feature/refactor-builds into dd22130 on master.

[coveralls]

Coverage increased (+0.5%) to 100.0% when pulling e11887c on feature/refactor-builds into dd22130 on master.