Bump ORCA patch version and update README and conan.py for cmake version

Signed-off-by: NEkta Khanna <ekhanna@pivotal.io>

README.md

@@ -17,7 +17,7 @@ Want to [Contribute](#contribute)?
 
 GPORCA supports various build types: debug, release with debug info, release.
 On x86 systems, GPORCA can also be built as a 32-bit or 64-bit library. You'll
-need CMake 3.0 or higher to build GPORCA. Get it from cmake.org, or your
+need CMake 3.1 or higher to build GPORCA. Get it from cmake.org, or your
 operating system's package manager.
 
 # First Time Setup

concourse/conanfile.py

@@ -33,10 +33,11 @@ class OrcaConan(ConanFile):
         try:
             vers = subprocess.check_output(["cmake", "--version"]).split()[2]
             if int(vers.split(".")[0]) < 3:
-                raise Exception("CMake version 3.0 or higher is required")
+                if int(vers.split(".")[1]) < 1:
+                    raise Exception("CMake version 3.1 or higher is required")
         except OSError as e:
             if e.errno == os.errno.ENOENT:
-                raise Exception("CMake is not found.  Please ensure the CMake 3.0 or later is installed")
+                raise Exception("CMake is not found.  Please ensure the CMake 3.1 or later is installed")
             else:
                 raise