It’ll be okay, fans. Shawn Mendes announced Friday that he’ll be postponing the European leg of his “Wonder” world tour until next spring and summer. “I’m so sorry I won’t be able to see you guys sooner,” the “It’ll Be Okay” singer, 23, tweeted along with new dates, which were pushed “due to the pandemic.” “This was a really difficult decision to make,” the Toronto native said in a note he added to the tweet. “With all of the logistical, travel and venue restrictions still uncertain in Europe due to the pandemic, we were forced to make the tough decision of moving the tour leg to the end of th…