fix: fix macOS minimum deployment target

Author: sbertix

.github/workflows/release.yml

@@ -63,7 +63,7 @@ jobs:
       - name:                Docs
         uses:                SwiftDocOrg/swift-doc@master
         with:
-          base-url:          "https://sbertix.github.io/DropView"
+          base-url:          "https://sbertix.github.io/DropView/"
           format:            "html"
           inputs:            "Sources"
           module-name:       DropView

Package.swift

@@ -7,7 +7,7 @@ let package = Package(
     name: "DropView",
     platforms: [
         .iOS(.v13),
-        .macOS(.v10_15),
+        .macOS(.v11),
         .tvOS(.v13),
         .watchOS(.v6)
     ],