Require o.e.core.resources version 3.21.0 in o.e.search.core

org.eclipse.search.internal.core.text.FileCharSequenceProvider.toShortString(...)
requires the method 'byte[]
org.eclipse.core.resources.IFile.readNBytes(int)' which was introduced
in org.eclipse.core.resources 3.21.100.

See also commit 906371db294e0d090180248d673d0c84f7b2d2b9

bundles/org.eclipse.search.core/META-INF/MANIFEST.MF

@@ -12,7 +12,7 @@ Export-Package: org.eclipse.search.core.text,
  org.eclipse.search.internal.core.text;x-friends:="org.eclipse.search,org.eclipse.search.tests"
 Require-Bundle: 
  org.eclipse.core.runtime;bundle-version="[3.29.0,4.0.0)",
- org.eclipse.core.resources;bundle-version="[3.14.0,4.0.0)",
+ org.eclipse.core.resources;bundle-version="[3.21.0,4.0.0)",
  org.eclipse.core.filesystem;bundle-version="[1.3.0,2.0.0)",
  org.eclipse.core.filebuffers;bundle-version="[3.5.0,4.0.0)",
  org.eclipse.ltk.core.refactoring;bundle-version="[3.5.0,4.0.0)",