patch(snowflake): update discord epoch to be static property

Author: cryptoAlgorithm

Sources/DiscordKitCore/Extensions/Snowflake+decode.swift

@@ -7,13 +7,13 @@
 
 import Foundation
 
-let DISCORD_EPOCH = 1420070400000
-
 public extension Snowflake {
+    static let DISCORD_EPOCH = 1420070400000
+
     /// Decodes this Snowflake into a Date
     func decodeToDate() -> Date? {
         guard let intSnowflake = Int(self) else { return nil }
-        let millisTimestamp = (intSnowflake >> 22) + DISCORD_EPOCH
+        let millisTimestamp = (intSnowflake >> 22) + Self.DISCORD_EPOCH
         return Date(timeIntervalSince1970: Double(millisTimestamp) / 1000.0)
     }
 }

Sources/DiscordKitCore/Objects/Data/Snowflake.swift

@@ -11,7 +11,7 @@ public typealias Snowflake = String
 
 extension Snowflake {
     init(timestamp: Date = .init()) {
-        let epoch = Int(timestamp.timeIntervalSince1970*1000) - DISCORD_EPOCH
+        let epoch = Int(timestamp.timeIntervalSince1970*1000) - Self.DISCORD_EPOCH
         self.init(epoch << 22)
     }
 }