Change Java compilation version from default to 1.8
Change Java compilation version from default to 1.8

tonytassevil1/Letter_game,locohic/LETTER_GAME,Nicobas/TP_4A_2017_Letter_Game_ESIEA,Thierrychhuon/LetterGame-4A,RaphIancu/LetterGame-IANCU-COULON,bahriAY/ArchitectureLogicielle,acorolus/LetterGame