[vpicc] update Appveyor

Updated AppVeyor with

* Usage of VS2019
* Usage of PyCryptodome

appveyor.yml

@@ -2,7 +2,7 @@ platform:
  - x86
  - x64
 
-os: Visual Studio 2015
+os: Visual Studio 2019
 
 install:
  - date /T & time /T
@@ -27,7 +27,7 @@ install:
  - python -m pip install --upgrade pip
  - pip install virtualenv
  - pip install -U setuptools
- - easy_install PyCrypto
+ - pip install pycryptodome
  - pip install pbkdf2
  - pip install Pillow
  - pip install pyreadline
@@ -36,7 +36,7 @@ install:
  - set PATH=C:\cygwin\bin;%PATH%
 
  # set Visual Studio 2015 build environment
- - set VSVER=14
+ - set VSVER=19
  - ps: $env:VSCOMNTOOLS=(Get-Content ("env:VS" + "$env:VSVER" + "0COMNTOOLS"))
  - echo "Using Visual Studio %VSVER%.0 at %VSCOMNTOOLS%"
  - call "%VSCOMNTOOLS%\..\..\VC\vcvarsall.bat" %VCVARS_PLATFORM%