travis: fix python crud, use container infrastructure

.travis.yml

@@ -2,7 +2,7 @@ env:
   global:
     - DEPS_DIR=${TRAVIS_BUILD_DIR}/deps
 language: c
-sudo: required
+sudo: false
 cache:
   directories:
     - ${DEPS_DIR}/doxygen/doxygen-1.8.11/bin
@@ -48,10 +48,12 @@ install:
     - |
       if [[ ${TRAVIS_OS_NAME} == "osx" ]]; then
         export LLVM_POSTFIX="";
-        brew install llvm qemu lz4 python@3 squashfs jq
-        export PATH="/usr/local/opt/llvm/bin:/usr/local/opt/python@3/bin:$PATH";
+        brew install llvm qemu lz4 squashfs jq ;
+        brew upgrade python ;
+        export PATH="$(brew --prefix llvm)/bin:$(brew --prefix python3)/bin:$PATH";
       fi
 
+    - pip3 install --user --upgrade pip setuptools wheel
     # Travis has an OLD doxygen build, so we fetch a recent one
     - export DOXY_BINPATH=${DEPS_DIR}/doxygen/doxygen-1.8.11/bin
     - if [ ! -e "$DOXY_BINPATH/doxygen" ]; then mkdir -p ${DEPS_DIR}/doxygen; fi
@@ -62,7 +64,7 @@ install:
 before_script:
   - wget -nv https://github.com/reswitched/Mephisto/releases/download/v1.0.2/ctu_$TRAVIS_OS_NAME
   - chmod +x ctu_$TRAVIS_OS_NAME
-  - sudo pip3 install -r requirements.txt
+  - pip3 install --user -r requirements.txt
 
 script:  make LD=ld.lld$LLVM_POSTFIX && LD=ld.lld$LLVM_POSTFIX make -C projects/ace_loader && make run_tests MEPHISTO=./ctu_$TRAVIS_OS_NAME