Merge v1.x

include/spdlog/common.h

@@ -156,6 +156,16 @@ spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT;
 using level_hasher = std::hash<int>;
 } // namespace level
 
+//
+// Color mode used by sinks with color support.
+//
+enum class color_mode
+{
+    always,
+    automatic,
+    never
+};
+
 //
 // Pattern time - specific time getting to use for pattern_formatter.
 // local time by default