Rework Mac OS build

Use cmake && make to prebuild opencv libraries and use pip to pack them

Author: GArik

.travis.yml

@@ -85,6 +85,8 @@ jobs:
         - ENABLE_CONTRIB=0
         - ENABLE_HEADLESS=0
         - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
 
     # headless builds for MacOS
@@ -96,6 +98,8 @@ jobs:
         - ENABLE_CONTRIB=0
         - ENABLE_HEADLESS=1
         - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
 
     # Contrib builds for MacOS
@@ -107,6 +111,8 @@ jobs:
         - ENABLE_CONTRIB=1
         - ENABLE_HEADLESS=0
         - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
 
     # headless contrib builds for MacOS
@@ -118,6 +124,8 @@ jobs:
         - ENABLE_CONTRIB=1
         - ENABLE_HEADLESS=1
         - TEST_DEPENDS=numpy==1.17.3
+      cache:
+        directories: $HOME/.ccache
 
 
     # default builds for Linux

pyproject.toml

@@ -1,6 +1,6 @@
 [build-system]
 requires = [
-  "setuptools", "wheel", "scikit-build", "cmake", "pip",
+  "setuptools", "wheel", "pip",
   "numpy==1.13.3; python_version=='3.6' and platform_machine != 'aarch64'",
   "numpy==1.19.3; python_version>='3.6' and sys_platform == 'linux' and platform_machine == 'aarch64'",
   "numpy==1.14.5; python_version=='3.7' and platform_machine != 'aarch64'",