Update to 19.10, fix lapack patch, fix numpy deps

[aldanor]

• Update dlib to v19.10
• Fix numpy deps as recommended here
• Fix out-of-date patch files

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[aldanor]

@conda-forge-admin, please rerender

[aldanor]

Well that's just weird, the patch works for me locally (on OS X):

$ conda build recipe
...
Applying patch: 'dlib-feedstock/recipe/lapack_sgetrf.patch'
patching file dlib/cmake_utils/find_blas.cmake
...

Edit: fixed (whitespace issues).

[aldanor]

Ok, the Linux builds are green, waiting on win/osx.

[aldanor]

Something's off with target_compile_features on OS X:

CMake Error at /Users/travis/miniconda3/conda-bld/dlib_1523209255322/work/dlib-19.10/dlib/cmake_utils/use_cpp_11.cmake:74 (target_compile_features):
  target_compile_features The compiler feature "cxx_thread_local" is not
  known to CXX compiler
  "Clang"
  version 6.1.0.6020053.

It must be this commit: davisking/dlib@3b2d73d

Ok, apparently it's a known thing so it can be patched for now.

[aldanor]

@jschueller, @patricksnape - the build is green, could this get merged please?

Thanks!

[patricksnape]

Thanks @aldanor !