(BC-87F0): Add `<-denotational@component' for A-BC-87F0.

(BC-87F0): Add `<-denotational@component' for A-BC-87F0.
(A-BC-87F0): New abstract node; use `<-denotational@component' for
U+5184 and U+4E39.
(BC-87F0-itaiji-001): New character; use `<-denotational' for U+4E39;
use `<-denotational@component' for A-BC-87F0.
(A-IWDSU+20542): New abstract node.
(U-00020542): Add `<-denotational' for A-IWDSU+20542; add
`ideographic-structure'; add `sound@ja/on'.
(IU+20542): Add `ideographic-structure'; unify MJ031031 and
KOSEKI-017880; add `<-formed' for U-0002F815 and UU+518D; add
`<-vulgar' for U-0002F815; add representative nodes.
(U-00020545): New character; use `<-denotational' for A-IWDSU+20542.
(A-U+2BCB8-itaiji-001): New abstract node; unify A-U+2BCB8-itaiji-002.
(U+2BCB8-itaiji-001): New character; use `<-denotational' for
A-U+2BCB8-itaiji-001.
(U+2BCB8-itaiji-002): Ditto.
(U+5191): Add `ideographic-structure'.
(CB06902): New character; use `<-denotational' for U+5191.
(CB00953): New character; use `<-denotational' for U+5192.
(U-0002055B): Add `<-denotational@component' for A-IWDSU+2055B; apply
new conventions for glyph granularity.
(A-IWDSU+2055B): New abstract node.