pex 2.11.0

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2.11.0

This release adds support for creating native PEX executables that
contain their own hermetic CPython interpreter courtesy of
Python Standalone Builds and the Science project.

You can now specify --scie {eager,lazy} when building a PEX file and
one or more native executable PEX scies will be produced (one for each
platform the PEX supports). These PEX scies are single file
executables that look and behave like traditional PEXes, but unlike
PEXes they can run on a machine with no Python interpreter available.

• Add --scie option to produce native PEX exes. (#2466)