procfs breaking changes

• v0.8.1 \u2192 v0.9.0breaking

  Store cputime in ticks, not fractional seconds (#106)

• v0.8.1 \u2192 v0.9.0breaking

  Remove deprecated functions (#107)

• v0.8.1 \u2192 v0.9.0breaking

  Minimum supported rust version has been changed from 1.33.0 to 1.34.0

• v0.8.1 \u2192 v0.9.0breaking

  Add a private field to some large structs (#101)

• v0.7.9 \u2192 v0.8.0breaking

  A typo is fixed in the name of a public field: [hugetlbpages](https://docs.rs/procfs/0.8.0/procfs/process/struct.Status.html#structfield.hugetlbpages) (#83)

• v0.14.2 \u2192 v0.15.0breaking

  ticks_per_second and page_size are infallible by @eminence in https://github.com/eminence/procfs/pull/235

• v0.14.2 \u2192 v0.15.0breaking

  parse uid for /proc/net/{tcp,udp} by @trinity-1686a in https://github.com/eminence/procfs/pull/231

• v0.14.2 \u2192 v0.15.0breaking

  Refactor and expose memory map processing. by @afranchuk in https://github.com/eminence/procfs/pull/237

• v0.13.2 \u2192 v0.14.0breaking

  Process: namespaces: Change from Vec to HashMap by @arilou in https://github.com/eminence/procfs/pull/185

• v0.12.0 \u2192 v0.13.0breaking

  `Process` no longer implements `Clone`.

• v0.12.0 \u2192 v0.13.0breaking

  Because each `Process` has a handle to its opened proc directory, there is no longer any PID reuse problems (that is, there is no risk of accidentally getting process information for a new process that has reused a PID)

• v0.12.0 \u2192 v0.13.0breaking

  Internally, it now maintains a handle to an opened `/proc/<pid>` directory. So each `Process` will have an open file handle, which can matter in extreme cases when you have a large number of `Process` objects created.

• v0.12.0 \u2192 v0.13.0breaking

  The `Process` struct has been changed in some important ways:

• v0.12.0 \u2192 v0.13.0breaking

  MSRV has been changed from 1.34 to 1.48

• v0.11.1 \u2192 v0.12.0breaking

  Make the flate2 dependency optional by @eminence in https://github.com/eminence/procfs/pull/157 The `flate2` dependencies was used only in the [`kernel_config`](https://docs.rs/procfs/latest/procfs/fn.kernel_config.html) method, which would try to read a compressed `/proc/config.gz` file if it existed. The `flate2` dependency is now optional (and enabled by default). If you are using procfs with "default-features = false" *and* you are using the `kernel_config` method, pay special attention here

• v0.10.1 \u2192 v0.11.0breaking

  Switch to u64 from usize in many places by @h33p in https://github.com/eminence/procfs/pull/147

• v0.10.1 \u2192 v0.11.0breaking

  Remove unwraps from our lazy statics by @eminence in https://github.com/eminence/procfs/pull/150

• v0.10.1 \u2192 v0.11.0breaking

  This change should make `procfs` panic even less, but as the cost of a breaking API change that wraps the return value of some functions in a `Result`

• v0.10.1 \u2192 v0.11.0breaking

  On 64-bit machines, this change should have no impact on behavior, but it is still a breaking change as these types are part of the public API.

• v0.9.0 \u2192 v0.10.0breaking

  Changed inodes to u64, fixed a test, and updated a doc string #132

• v0.9.0 \u2192 v0.10.0breaking

  Use u16 for kernel patch version number #137

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