travis: Use CPython3.4 instead of 3.3.

.travis.yml

@@ -7,7 +7,7 @@ before_script:
   - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
   - sudo add-apt-repository -y ppa:terry.guo/gcc-arm-embedded
   - sudo apt-get update -qq
-  - sudo apt-get install -y python3.3 python3 gcc-4.7 gcc-multilib gcc-arm-none-eabi qemu-system mingw32
+  - sudo apt-get install -y python3.4 python3 gcc-4.7 gcc-multilib gcc-arm-none-eabi qemu-system mingw32
   # For teensy build
   - sudo apt-get install realpath
 
@@ -25,8 +25,8 @@ script:
   - make -C cc3200 BTARGET=bootloader  BTYPE=release
   - make -C windows CROSS_COMPILE=i586-mingw32msvc-
 
-  - (cd tests && MICROPY_CPYTHON3=python3.3 ./run-tests)
-  - (cd tests && MICROPY_CPYTHON3=python3.3 ./run-tests --emit native)
+  - (cd tests && MICROPY_CPYTHON3=python3.4 ./run-tests)
+  - (cd tests && MICROPY_CPYTHON3=python3.4 ./run-tests --emit native)
 
 after_failure:
   - (cd tests && for exp in *.exp; do testbase=$(basename $exp .exp); echo -e "\nFAILURE $testbase"; diff -u $testbase.exp $testbase.out; done)