Release 9.1.13

• Update dependency @angular/common to v9.1.13 (#22) (d4a7906)
• Update dependency rxjs to v6.6.3 (#18) (c8aa28c)
• Update dependency rxjs to v6.6.2 (#17) (826d1b7)
• Update dependency rxjs to v6.6.1 (#16) (ef094b3)