Set an appropriate name of the method

types/milliseconds/index.d.ts

@@ -9,7 +9,7 @@ interface Milliseconds {
 	hours(hours: number): number
 	days(days: number): number
 	weeks(weeks: number): number
-	month(month: number): number
+	months(months: number): number
 	years(years: number): number
 }
 

types/milliseconds/milliseconds-tests.ts

@@ -5,5 +5,5 @@ milliseconds.minutes(2)
 milliseconds.hours(3)
 milliseconds.days(4)
 milliseconds.weeks(5)
-milliseconds.month(6)
+milliseconds.months(6)
 milliseconds.years(7)