[web-animations-1] Update 'Changes since last publication' section

Author: birtles

web-animations-1/Overview.bs

@@ -83,6 +83,7 @@ Work Status: Refining
 ED: https://drafts.csswg.org/web-animations-1/
 TR: https://www.w3.org/TR/web-animations-1/
 
+Previous version: https://www.w3.org/TR/2021/WD-web-animations-1-20210518/
 Previous version: https://www.w3.org/TR/2018/WD-web-animations-1-20181011/
 Previous version: https://www.w3.org/TR/2016/WD-web-animations-1-20160913/
 Previous version: https://www.w3.org/TR/2015/WD-web-animations-1-20150707/
@@ -6366,29 +6367,10 @@ Changes since last publication {#changes-since-last-publication}
 =======================================
 
 The following changes have been made since the <a
-  href="https://www.w3.org/TR/2018/WD-web-animations-1-20181011/">11 October
-2018 Working Draft</a>:
-
-*   Made the definition of a [=current=] [=animation effect=] incorporate the
-    associated animation's [=playback rate=] (<a
-    href="https://github.com/w3c/csswg-drafts/issues/3193">#3193</a>).
-*   Updated the steps for resolving which properties to use when calculating
-    [=computed keyframes=] when physical and logical properties are used.
-*   Introduced steps for removing animations that have been overridden:
-    [[#replacing-animations]].
-    *   Added a new [=remove event=] to signal when this process occurs.
-    *   Added corresponding IDL members to the {{Animation}} interface:
-        {{Animation/replaceState}},
-        {{Animation/onremove}},
-        {{Animation/persist}}.
-*   Added the {{Animation/commitStyles}} method to the {{Animation}} interface
-    to allow preserving the result of an [=animation=] that has been removed.
-*   Added an {{Animatable/getAnimations(options)/options}} parameter to the
-    {{Animatable/getAnimations()}} method on the {{Animatable}} interface
-    to allow fetching all animations on descendants of a particular element.
-*   Moved the definition of {{DocumentOrShadowRoot/getAnimations()}} from the
-    {{Document}} interface to the {{DocumentOrShadowRoot}} interface mixin
-    so that it can be used with {{ShadowRoot}}s as well.
+  href="https://www.w3.org/TR/2021/WD-web-animations-1-20210518/">18 May
+2021 Working Draft</a>:
+
+(None as yet)
 
 The <a
   href="https://github.com/w3c/csswg-drafts/commits/main/web-animations-1">changelog</a>