Bump travis and the macOS/Linux packaging to use mono 5.20.1.

.travis.yml

@@ -3,7 +3,7 @@
 
 dist: xenial
 language: csharp
-mono: 5.10.0
+mono: 5.20.1
 
 cache:
   directories:

packaging/linux/buildpackage.sh

@@ -7,7 +7,7 @@ command -v python >/dev/null 2>&1 || { echo >&2 "Linux packaging requires python
 command -v tar >/dev/null 2>&1 || { echo >&2 "Linux packaging requires tar."; exit 1; }
 command -v curl >/dev/null 2>&1 || command -v wget > /dev/null 2>&1 || { echo >&2 "Linux packaging requires curl or wget."; exit 1; }
 
-DEPENDENCIES_TAG="20190316"
+DEPENDENCIES_TAG="20190506"
 
 if [ $# -eq "0" ]; then
 	echo "Usage: $(basename "$0") version [outputdir]"

packaging/osx/buildpackage.sh

@@ -9,7 +9,7 @@ if [[ "$OSTYPE" != "darwin"* ]]; then
 	command -v genisoimage >/dev/null 2>&1 || { echo >&2 "macOS packaging requires genisoimage."; exit 1; }
 fi
 
-LAUNCHER_TAG="osx-launcher-20190317"
+LAUNCHER_TAG="osx-launcher-20190506"
 
 if [ $# -ne "2" ]; then
 	echo "Usage: $(basename "$0") tag outputdir"