fix: use python, drop Conda 2.7 on Windows

Author: henryiii

.appveyor.yml

@@ -11,7 +11,6 @@ environment:
   matrix:
   - PYTHON: 27
   - PYTHON: 36
-  - CONDA: 27
   - CONDA: 36
 install:
 - cmd: '"%VS140COMNTOOLS%\..\..\VC\vcvarsall.bat" %PLATFORM%'

.github/workflows/wheels.yml

@@ -4,8 +4,8 @@ on:
   workflow_dispatch:
   pull_request:
   push:
-    # branches:
-    #  - master
+    branches:
+     - master
   release:
     types:
       - published

.travis.yml

@@ -1,5 +1,5 @@
 language: cpp
-dist: trusty
+dist: xenial
 matrix:
   include:
   - os: linux

conda.recipe/meta.yaml

@@ -9,22 +9,18 @@ build:
   number: {{ environ.get('GIT_DESCRIBE_NUMBER', 0) }}
   {% if environ.get('GIT_DESCRIBE_NUMBER', '0') == '0' %}string: py{{ environ.get('PY_VER').replace('.', '') }}_0
   {% else %}string: py{{ environ.get('PY_VER').replace('.', '') }}_{{ environ.get('GIT_BUILD_STR', 'GIT_STUB') }}{% endif %}
-  script_env:
-    - CC
-    - CXX
   script: |
     # This is a total hack because we are not using conda-forge pybind11. Remove after 2.6.0.
     # And never do this yourself unless you know what you are doing (it
     # explicitly is okay with pybind11, but may not be with arbitrary
     # libraries)
-    {{ PYTHON }} -m pip install -vvv "git+https://github.com/pybind/pybind11.git@master"
-    {{ PYTHON }} -m pip install . -vvv --no-deps
-    {{ PYTHON }} -m pip uninstall -y pybind11
+    python -m pip install -vvv "git+https://github.com/pybind/pybind11.git@master"
+    python -m pip install . -vvv --no-deps
+    python -m pip uninstall -y pybind11
 
 requirements:
   build:
     - {{ compiler('cxx') }}
-    - vs2017_{{ target_platform }}    # [win]
     # This is a hack because we are not using conda-forge pybind11. Remove after 2.6.0
     - cmake