SLUB Digitalcollections 3.0.1

What's Changed

• Bump grunt from 1.5.2 to 1.5.3 in /Build by @dependabot in #42
• Fix display and conditions of PDF download link by @dvoracek-slub in #47
• Adapt to Kitodo search performance PR by @dvoracek-slub in #46
• [Task] convert special characters to HTML entities by @ByteParty in #52

Full Changelog: v3.0.0...v3.1.0