v0.30.0:
This release adds support for half-precision float and schedules the
deprecation of memset/memcpy accepting 5 arguments (cf. LLVM change).
* Fix use of -fPIC flag in wheels
* Remove restriction on sphinx version from Anaconda distro
* fix for block labels which contain "interesting" characters
* Deprecate the use of memset/memcpy with alias
* Add fp16 Intrinsics
* Add Half-Precision Type
* Add -fPIC flag for manylinux1 wheel building
* Fix incorrect hierarchy in the documentation for ir.Constant.
* Update docs
* Fix leak on string returning APIs.
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