Update cmake

scripts/package

@@ -24,7 +24,7 @@ ci_appimage() { # docker-image: ubuntu:14.04
     apt update -qq
 
     apt -y install build-essential mesa-common-dev libglu1-mesa-dev qt59base qt59websockets
-    curl -fsSL https://cmake.org/files/v3.11/cmake-3.11.4-Linux-x86_64.tar.gz | tar -xz --strip-components=1 -C /
+    curl -fsSL https://cmake.org/files/v3.12/cmake-3.12.1-Linux-x86_64.tar.gz | tar -xz --strip-components=1 -C /
     apt -y install libssl-dev libcurl3 libcurl3-gnutls libcurl4-gnutls-dev libxpm-dev
 
     useradd -m ${PKGUSER}