fix(parser): Have </button> close <p>

fb55 · fb55 · commit 7c32ab6c5506 · 2022-05-08T11:36:45.000+01:00
Fixes #533 A PR with a test was opened at html5lib/html5lib-tests#146
diff --git a/packages/parse5/lib/parser/index.ts b/packages/parse5/lib/parser/index.ts
@@ -2466,6 +2466,7 @@ function endTagInBody<T extends TreeAdapterTypeMap>(p: Parser<T>, token: TagToke
         case $.MAIN:
         case $.MENU:
         case $.ASIDE:
+        case $.BUTTON:
         case $.CENTER:
         case $.FIGURE:
         case $.FOOTER:
