Dependency setting clean up (AtsushiSakai#348)

* requiirements.txt use specific version

* use appveyor

* fix appveyor

* fix appveyor

* fix appveyor

Author: AtsushiSakai

.travis.yml

@@ -18,6 +18,6 @@ Please check this paper to understand the philosophy of this project.
 
 ## Check your Python version.
 
-We only accept a PR for Python 3.6.x or higher.
+We only accept a PR for Python 3.8.x or higher.
 
 We will not accept a PR for Python 2.x.

CONTRIBUTING.md

@@ -34,6 +34,7 @@ install:
   - SET PATH=%PYTHON%;%PYTHON%\Scripts;%PYTHON%\Library\bin;%PATH%
   - SET PATH=%PATH%;C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin
   - conda config --set always_yes yes --set changeps1 no
+  - conda config --append channels conda-forge
   - conda update -q conda
   - conda info -a
   - conda env create -f C:\\projects\pythonrobotics\environment.yml

appveyor.yml

@@ -2,10 +2,9 @@ name: python_robotics
 dependencies:
 - python
 - pip
-- matplotlib
 - scipy
 - numpy
 - pandas
+- cvxpy
+- matplotlib
 - coverage
-- pip:
-    - cvxpy

environment.yml

@@ -1,5 +1,5 @@
-numpy
-pandas
-scipy
-matplotlib
-cvxpy
+numpy == 1.19.0
+scipy == 1.5.1
+pandas == 1.0.5
+matplotlib == 3.2.2
+cvxpy == 1.1.1