Fixes SwiftLint warnings

Author: simonbs

Sources/Runestone/TextView/Core/Mac/TextView_Mac.swift

@@ -540,7 +540,7 @@ open class TextView: NSView {
         }
     }
 
-    open override func resetCursorRects() {
+    override public func resetCursorRects() {
         super.resetCursorRects()
         addCursorRect(bounds, cursor: .iBeam)
     }

Sources/Runestone/TextView/Navigation/NavigationLocationFactories/StatefulLineNavigationLocationFactory.swift

@@ -77,7 +77,7 @@ private extension StatefulLineNavigationLocationFactory {
 }
 
 extension StatefulLineNavigationLocationFactory.DirectionedOffset {
-    static func +(lhs: Self, rhs: Self) -> Self {
+    static func + (lhs: Self, rhs: Self) -> Self {
         Self(rawValue: lhs.rawValue + rhs.rawValue)
     }
 }

Sources/Runestone/TextView/Navigation/StringTokenizer.swift

@@ -187,7 +187,6 @@ private extension StringTokenizer {
         }
     }
 
-    // swiftlint:disable:next cyclomatic_complexity
     private func location(from location: Int, toWordBoundaryInDirection direction: TextDirection) -> Int? {
         func advanceIndex(_ index: Int) -> Int {
             let preferredIndex: Int