DEBUG: Use findfirst-1.0

Author: tkf

appveyor.yml

@@ -70,7 +70,7 @@ build_script:
           versioninfo(true);
       end;
       VERSION >= v\"0.7.0-DEV.5183\" && using Pkg;
-      Pkg.add(\"PyCall\")"
+      Pkg.add(PackageSpec(url=\"https://github.com/tkf/PyCall.jl\", rev=\"findfirst-1.0\"))"
   - "%PYTHONDIR%\\python.exe -m pip install --quiet tox"
 
 test_script: