style(rubocop): Style/MutableConstant

lib/postal/app_logger.rb

@@ -45,8 +45,8 @@ module Postal
 
   class LogFormatter
 
-    TIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%3N".freeze
-    COLORS = [32, 34, 35, 31, 32, 33]
+    TIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%3N"
+    COLORS = [32, 34, 35, 31, 32, 33].freeze
 
     def call(severity, datetime, progname, msg)
       time = datetime.strftime(TIME_FORMAT)

lib/postal/message_db/statistics.rb

@@ -8,8 +8,8 @@ module Postal
         @database = database
       end
 
-      STATS_GAPS = { hourly: :hour, daily: :day, monthly: :month, yearly: :year }
-      COUNTERS = [:incoming, :outgoing, :spam, :bounces, :held]
+      STATS_GAPS = { hourly: :hour, daily: :day, monthly: :month, yearly: :year }.freeze
+      COUNTERS = [:incoming, :outgoing, :spam, :bounces, :held].freeze
 
       #
       # Increment an appropriate counter

lib/postal/message_inspectors/spam_assassin.rb

@@ -7,7 +7,7 @@ module Postal
       EXCLUSIONS = {
         outgoing: ["NO_RECEIVED", "NO_RELAYS", "ALL_TRUSTED", "FREEMAIL_FORGED_REPLYTO", "RDNS_DYNAMIC", "CK_HELO_GENERIC", /^SPF_/, /^HELO_/, /DKIM_/, /^RCVD_IN_/],
         incoming: []
-      }
+      }.freeze
 
       def inspect_message(inspection)
         data = nil

lib/postal/received_header.rb

@@ -6,7 +6,7 @@ module Postal
     OUR_HOSTNAMES = {
       smtp: Postal.config.dns.smtp_server_hostname,
       http: Postal.config.web.host
-    }
+    }.freeze
 
     class << self
 

lib/postal/reply_separator.rb

@@ -15,7 +15,7 @@ module Postal
       /^>*\s*Sent from my.*/m,
       /^>*\s*=== Please reply above this line ===.*/m,
       /(^>.*\n?){10,}/
-    ]
+    ].freeze
 
     def self.separate(text)
       return "" unless text.is_a?(String)