• Supports creating an independent instances with its own config, and optionally a name (if specified the name appears in log output):

local logger = log{name="mymod", level="warn", usecolor=false}
logger.info("my info log")

Original global logger still works exactly as it used to be

• Customizable serializer:

local inspect = require "inspect"
log.tostr = function(v) return inspect(v, {newline=" ", indent="", depth=2}) end
log.info({ key = "value" })
-- [INFO  14:32:01] src.lua:2: { key = "value" }

• Optionally logs to stderr, useful when stdout should not be used
• Added a suite of unit tests, just run lua test.lua
• Disabled log levels are automatically assigned a noop function instead of checking the level on every call - more efficient (and transparent to the user)
• Other minor fixes