Add task pool, minor changes

- Add task pool to smooth impact when list in config is pretty long
- Update dependencies
- Update config

vendor/github.com/alitto/pond/worker.go

@@ -0,0 +1,35 @@
+package pond
+
+import (
+	"context"
+	"sync"
+)
+
+// worker represents a worker goroutine
+func worker(context context.Context, waitGroup *sync.WaitGroup, firstTask func(), tasks <-chan func(), taskExecutor func(func(), bool)) {
+
+	// If provided, execute the first task immediately, before listening to the tasks channel
+	if firstTask != nil {
+		taskExecutor(firstTask, true)
+	}
+
+	defer func() {
+		waitGroup.Done()
+	}()
+
+	for {
+		select {
+		case <-context.Done():
+			// Pool context was cancelled, exit
+			return
+		case task, ok := <-tasks:
+			if task == nil || !ok {
+				// We have received a signal to exit
+				return
+			}
+
+			// We have received a task, execute it
+			taskExecutor(task, false)
+		}
+	}
+}