(U-00021948): Use `->denotational' and `->subsumptive'.

(U-00021948): Use `->denotational' and `->subsumptive'.
(A-IWDSU+219B1): New abstract node.
(U-000219B1): New character; use `<-denotational' for A-IWDSU+219B1.
(M-07049): Use `<-denotational' for U-000219B1; don't use `=>ucs' for
U-000219B5; unify IU+219B1, MJ033931 and KOSEKI-080160.
(U-000219B5): Use `->subsumptive'; add `<-denotational' for
A-IWDSU+219B1.
(U-000219AD): Use `->denotational' and `->subsumptive'.
(U-000219B2): New character; use `<-denotational' for A-IWDSU+219B2.
(U-000219B3): Likewise.
(U-000219B4): New character.
(A-IWDSU+219B2): New abstract node.