Upgrade coincurve dependency

.gitlab-ci.yml

@@ -136,7 +136,6 @@ build:windows:
     - pip install virtualenv pywin32
     - virtualenv venv
     - venv/Scripts/activate.ps1
-    - pip install pip==19.3.1; $true # $true ignores errors. need this to get the correct coincurve wheel. see commit notes for details.
   after_script:
     - rmdir -Recurse venv
   script:

setup.py

@@ -51,7 +51,7 @@ setup(
         'docopt==0.6.2',
         'hachoir',
         'multidict==4.6.1',
-        'coincurve==11.0.0',
+        'coincurve==15.0.0',
         'pbkdf2==1.3',
         'attrs==18.2.0',
         'pylru==1.1.0',