Added moon route and changed Date fields from pointers to values

types/moon.go

@@ -0,0 +1,9 @@
+package types
+
+// The Moon data type, representing the moon phase,
+// the moon phase icon and the moon progress(%).
+type Moon struct {
+	Icon       string `json:"icon"`
+	Phase      string `json:"phase"`
+	Percentage string `json:"percentage"`
+}