[skip-ci] tmux: update to 2.8

tmux/PKGBUILD

@@ -1,5 +1,5 @@
 pkgname=tmux
-pkgver=2.7
+pkgver=2.8
 pkgrel=1
 pkgdesc='A terminal multiplexer, intended as an alternative to GNU screen'
 arch=('x86_64')
@@ -9,12 +9,12 @@ license=('BSD')
 depends=('ncurses' 'libevent' 'libutempter')
 source=("https://github.com/tmux/tmux/releases/download/${pkgver}/tmux-${pkgver}.tar.gz"
         LICENSE)
-sha256sums=('9ded7d100313f6bc5a87404a4048b3745d61f2332f99ec1400a7c4ed9485d452'
+sha256sums=('7f6bf335634fafecff878d78de389562ea7f73a7367f268b66d37ea13617a2ba'
             'b5de80619e4884ced2dfe0a96020e85dcfb715a831ecdfdd7ce8c97b5a6ff2cc')
 
 build() {
     cd "$pkgname-$pkgver"
-    ./configure --prefix=/usr
+    ./configure --prefix=/usr --enable-utempter
     make
 }