Fix UnhandledPromiseRejectionWarning

• Fixed bug Setting mob gives UnhandledPromiseRejectionWarning #4

Changes: v0.0.4...v0.0.5

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Changes: v0.0.3...v0.0.4

Document installation

Changes: v0.0.2...v0.0.3

Proof of concept

Changes: e8a3a41...v0.0.2