Add an additional newline after progress bar

This fixes a small output glitch of parallel testing.

Author: neonichu

Sources/Utility/ProgressBar.swift

@@ -129,6 +129,7 @@ public final class ProgressBar: ProgressBarProtocol {
 
     public func complete(success: Bool) {
         term.endLine()
+        term.endLine()
     }
 }