Index: adminimal_theme.info.yml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- adminimal_theme.info.yml	(revision 0f3ec5903dbc897667bf498d39f6228574abcb53)
+++ adminimal_theme.info.yml	(date 1595850139437)
@@ -1,7 +1,7 @@
 name: Adminimal
 type: theme
 description: 'Drupal administration theme with modern minimalist design.'
-# core: 8.x
+core_version_requirement: ^8 || ^9
 base theme: seven
 
 libraries:
@@ -25,10 +25,4 @@
   page_bottom: 'Page bottom'
   sidebar_first: 'First sidebar'
 regions_hidden:
-  - sidebar_first
-
-# Information added by Drupal.org packaging script on 2019-05-23
-version: '8.x-1.5'
-core: '8.x'
-project: 'adminimal_theme'
-datestamp: 1558584490
+  - sidebar_first
\ No newline at end of file