DEV: Enable unless cops

We discussed the use of `unless` internally and decided to enforce
available rules from rubocop to restrict its most problematic uses.

lib/tasks/javascript.rake

@@ -213,10 +213,10 @@ task "javascript:update" => "clean_up" do
   dependencies.each do |f|
     src = "#{library_src}/#{f[:source]}"
 
-    unless f[:destination]
-      filename = f[:source].split("/").last
-    else
+    if f[:destination]
       filename = f[:destination]
+    else
+      filename = f[:source].split("/").last
     end
 
     if src.include? "highlightjs"

lib/tasks/qunit.rake

@@ -90,7 +90,7 @@ task "qunit:test", %i[timeout qunit_path filter] do |_, args|
       Net::HTTP.get(uri)
     rescue Errno::ECONNREFUSED, Errno::EADDRNOTAVAIL, Net::ReadTimeout, EOFError
       sleep 1
-      retry unless elapsed() > 60
+      retry if elapsed() <= 60
       puts "Timed out. Can not connect to forked server!"
       exit 1
     end

lib/tasks/svg_icons.rake

@@ -19,10 +19,10 @@ task "svgicons:update" do
   dependencies.each do |f|
     src = "#{library_src}/#{f[:source]}/."
 
-    unless f[:destination]
-      filename = f[:source].split("/").last
-    else
+    if f[:destination]
       filename = f[:destination]
+    else
+      filename = f[:source].split("/").last
     end
 
     dest = "#{vendor_svgs}/#{filename}"