fix: fix warnings from deprecations across Crystal versions (#6100)

src/invidious/helpers/logger.cr

@@ -14,7 +14,9 @@ end
 class Invidious::LogHandler < Kemal::BaseLogHandler
   def initialize(@io : IO = STDOUT, @level = LogLevel::Debug, use_color : Bool = true)
     Colorize.enabled = use_color
-    Colorize.on_tty_only!
+    {% if compare_versions(Crystal::VERSION, "1.17.0") <= 0 %}
+      Colorize.on_tty_only!
+    {% end %}
   end
 
   def call(context : HTTP::Server::Context)

src/invidious/http_server/static_assets_handler.cr

@@ -82,7 +82,11 @@ module Invidious::HttpServer
     private def dispatch_serve(context, file, file_info, range_header)
       if range_header
         # an IO is needed for `serve_file_range`
-        file = file.is_a?(Bytes) ? IO::Memory.new(file, writeable: false) : file
+        {% if compare_versions(Crystal::VERSION, "1.21.0") <= 0 %}
+          file = file.is_a?(Bytes) ? IO::Memory.new(file, writeable: false) : file
+        {% else %}
+          file = file.is_a?(Bytes) ? IO::Memory.new(file, writable: false) : file
+        {% end %}
         serve_file_range(context, file, range_header, file_info)
       else
         context.response.headers["Accept-Ranges"] = "bytes"