Alternate solution to cancel travis timeout

Signed-off-by: TheJackiMonster <thejackimonster@gmail.com>

.travis.yml

@@ -5,7 +5,7 @@ os:
 osx_image: xcode11
 sudo: required
 install:
-- if [ "$TRAVIS_OS_NAME" = "osx" ]; then travis_wait package/prepare_osx.sh; fi
+- if [ "$TRAVIS_OS_NAME" = "osx" ]; then package/prepare_osx.sh; fi
 - if [ "$TRAVIS_OS_NAME" = "linux" ]; then package/prepare_linux.sh; fi
 script:
 - if [ "$TRAVIS_OS_NAME" = "osx" ]; then python3 -B -m pytest -vs; fi

package/prepare_osx.sh

@@ -1,6 +1,14 @@
 #!/bin/bash
 set -ev   # display each line executed along with output
-brew update
+brew update &
+while true; do
+  ps -p$! 2>& 1>/dev/null
+  if [ $? = 0 ]; then
+    echo "still updating..."; sleep 5
+  else
+    break
+  fi
+done
 
 # Upgrade to python 3.x
 brew upgrade python