Freeze the test dependency packages for Python 2.x to prevent further...

Freeze the test dependency packages for Python 2.x to prevent further deprecations. More and more packages drop Py2 support these days.

.travis.yml

@@ -151,7 +151,8 @@ before_install:
 
 install:
   - python -c 'import sys; print("Python %s" % (sys.version,))'
-  - if [ -n "${TRAVIS_PYTHON_VERSION##*-dev}" -a -n "${TRAVIS_PYTHON_VERSION##2.6*}" ]; then pip install -r test-requirements.txt $( [ -z "${TRAVIS_PYTHON_VERSION##pypy*}" -o -z "${TRAVIS_PYTHON_VERSION##3.[478]*}" ] || echo " -r test-requirements-cpython.txt" ) ; fi
+  - if [ -z "${TRAVIS_PYTHON_VERSION##2.*}" ]; then pip install -r test-requirements-27.txt ; fi
+  - if [ -n "${TRAVIS_PYTHON_VERSION##*-dev}" -a -n "${TRAVIS_PYTHON_VERSION##2.*}" ]; then pip install -r test-requirements.txt $( [ -z "${TRAVIS_PYTHON_VERSION##pypy*}" -o -z "${TRAVIS_PYTHON_VERSION##3.[478]*}" ] || echo " -r test-requirements-cpython.txt" ) ; fi
 #  - CFLAGS="-O2 -ggdb -Wall -Wextra $(python -c 'import sys; print("-fno-strict-aliasing" if sys.version_info[0] == 2 else "")')" python setup.py build
 
 before_script: ccache -s || true

test-requirements-27.txt

+attrs==20.3.0
+backports-abc==0.5
+backports.functools-lru-cache==1.6.3
+backports.shutil-get-terminal-size==1.0.0
+bleach==3.3.0
+configparser==4.0.2
+contextlib2==0.6.0.post1
+coverage==5.5
+decorator==4.4.2
+defusedxml==0.7.1
+entrypoints==0.3
+enum34==1.1.10
+functools32==3.2.3.post2
+futures==3.3.0
+importlib-metadata==2.1.1
+ipaddress==1.0.23
+ipykernel==4.10.1
+ipython==5.10.0
+ipython-genutils==0.2.0
+ipywidgets==7.6.3
+Jinja2==2.11.3
+jsonschema==3.2.0
+jupyter==1.0.0
+jupyter-client==5.3.5
+jupyter-console==5.2.0
+jupyter-core==4.6.3
+line-profiler==3.1.0
+MarkupSafe==1.1.1
+mistune==0.8.4
+nbconvert==5.6.1
+nbformat==4.4.0
+notebook==5.7.10
+numpy==1.16.6
+packaging==20.9
+pandocfilters==1.4.3
+pathlib2==2.3.5
+pexpect==4.8.0
+pickleshare==0.7.5
+pkg-resources==0.0.0
+prometheus-client==0.10.0
+prompt-toolkit==1.0.18
+ptyprocess==0.7.0
+pycodestyle==2.7.0
+Pygments==2.5.2
+pyparsing==2.4.7
+pyrsistent==0.15.7
+python-dateutil==2.8.1
+pyzmq==16.0.4
+qtconsole==4.7.7
+QtPy==1.9.0
+scandir==1.10.0
+Send2Trash==1.5.0
+simplegeneric==0.8.1
+singledispatch==3.6.1
+six==1.15.0
+terminado==0.8.3
+testpath==0.4.4
+tornado==5.1.1
+traitlets==4.3.3
+wcwidth==0.2.5
+webencodings==0.5.1
+widgetsnbextension==3.5.1
+zipp==1.2.0

test-requirements-cpython.txt

@@ -4,3 +4,4 @@ line_profiler
 pyzmq<17
 pyrsistent<0.16
 qtconsole<5
+decorator<5