refactor(eventsub): consume date.h as submodule (#6044)

.gitmodules

@@ -52,3 +52,6 @@
 [submodule "lib/certify"]
 	path = lib/certify
 	url = https://github.com/Chatterino/certify
+[submodule "lib/twitch-eventsub-ws/lib/date"]
+	path = lib/twitch-eventsub-ws/lib/date
+	url = https://github.com/HowardHinnant/date.git

CHANGELOG.md

@@ -41,7 +41,7 @@
 - Bugfix: Fixed an issue where commands would sometimes reset if Chatterino was improperly shut down. (#6011)
 - Bugfix: Fixed a thick border on Windows 11. (#5836)
 - Dev: Subscriptions to PubSub channel points redemption topics now use no auth token, making it continue to work during PubSub shutdown. (#5947)
-- Dev: Add initial experimental EventSub support. (#5837, #5895, #5897, #5904, #5910, #5903, #5915, #5916, #5930, #5935, #5932, #5943, #5952, #5953, #5968, #5973, #5974, #5980, #5981, #5985, #5990, #5992, #5993, #5996, #5995, #6000, #6001, #6002, #6003, #6005, #6007, #6010, #6008, #6012, #6013, #6015, #6017, #6027, #6028, #6035, #6036, #6040, #6041)
+- Dev: Add initial experimental EventSub support. (#5837, #5895, #5897, #5904, #5910, #5903, #5915, #5916, #5930, #5935, #5932, #5943, #5952, #5953, #5968, #5973, #5974, #5980, #5981, #5985, #5990, #5992, #5993, #5996, #5995, #6000, #6001, #6002, #6003, #6005, #6007, #6010, #6008, #6012, #6013, #6015, #6017, #6027, #6028, #6035, #6036, #6040, #6041, #6044)
 - Dev: Remove unneeded platform specifier for toasts. (#5914)
 - Dev: Highlight checks now use non-capturing groups for the boundaries. (#5784)
 - Dev: Removed unused PubSub whisper code. (#5898)

lib/twitch-eventsub-ws/include/twitch-eventsub-ws/chrono.hpp

@@ -3,7 +3,6 @@
 #include <boost/json.hpp>
 
 #include <chrono>
-#include <sstream>
 
 namespace chatterino::eventsub::lib {
 

lib/twitch-eventsub-ws/src/CMakeLists.txt

@@ -48,7 +48,12 @@ add_library(${PROJECT_NAME} STATIC ${SOURCE_FILES})
 # Generate source groups for use in IDEs
 # source_group(TREE ${CMAKE_SOURCE_DIR} FILES ${SOURCE_FILES})
 
-target_include_directories(${PROJECT_NAME} PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/../include")
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+        "${CMAKE_CURRENT_SOURCE_DIR}/../include"
+    PRIVATE
+        "${CMAKE_CURRENT_SOURCE_DIR}/../lib/date/include"
+)
 
 
 target_link_libraries(${PROJECT_NAME}

lib/twitch-eventsub-ws/src/chrono.cpp

@@ -1,6 +1,6 @@
 #include "twitch-eventsub-ws/chrono.hpp"
 
-#include "twitch-eventsub-ws/date.h"
+#include <date/date.h>
 
 #include <sstream>