changed c++ version to c++20

YourChat.pro

@@ -1,40 +0,0 @@
-TEMPLATE = app
-CONFIG += console c++11
-CONFIG -= app_bundle
-CONFIG -= qt
-TARGET = yourchat
-
-QMAKE_CC = g++-7
-QMAKE_CXX = g++-7
-QMAKE_CXXFLAGS += -std=gnu++11 -g
-
-SOURCES += main.cpp \
-    config.cpp \
-    server.cpp \
-    room.cpp \
-    user.cpp \
-    tools.cpp \
-    base.cpp
-
-DISTFILES += \
-    config/chatconfig.json
-
-HEADERS += \
-    config.h \
-    server.h \
-    room.h \
-    user.h \
-    tools.h \
-    base.h
-
-LIBS += -ljsoncpp \
-    -lpthread
-
-bin.path = /opt/yourchat
-bin.files += yourchat
-
-config.path = /etc/yourpart
-config.files += config/chatconfig.json
-
-INSTALLS += bin \
-    config