⬆️ Bump rasterio from 1.0.13 to 1.0.21

[dependabot-preview]

Bumps rasterio from 1.0.13 to 1.0.21.

Changelog

Sourced from rasterio's changelog.

1.0.21 (2019-02-28)

• Fix for bug in implementation of the pickle protocol (#1643).

1.0.20 (2019-02-27)

• Fix for an unchecked NULL pointer introduced in 1.0.19 that could result in
  segmentation fault on import of rasterio._env on Linux when GDAL data files
  are not available (for example, with wheels as on PyPI).

1.0.19 (2019-02-26)

• Do not set GDAL_DATA and PROJ_LIB when data files can be found at their built
  in locations (#1631).
• Add linear_units property to CRS (#1638).
• Ensure that AWS_NO_SIGN_REQUESTS is sufficient for accessing public S3
  datasets and that import of boto3 is not required (#1637).
• An out_dtype parameter has been added to DatasetReaderBase.read, enabling
  on-the-fly casting of raster values to the desired type (#1637). This uses
  the same latent feature used to get support for "int8" data.
• Restore pickle protocol for CRS, using WKT as state (#1625).
• Support for signed 8-bit integer datasets ("int8" dtype) has been added
  (#1595).

1.0.18 (2019-02-07)

• Fix a regression reported in #1623.

1.0.17 (2019-02-05)

• Fix a regression in evaluation of CRS equality (#1620).

1.0.16 (2019-02-04)

• A bug preventing GCPs from being created with new BufferedDatasetWriter
  instances (#1600) has been fixed (#1610).
• A previously unreported bug preventing BufferedDatasetWriters from being
  opened in r+ mode has been fixed.
• A regression in creating CRS objects from PROJ4 strings that include
  "+wktext" (#1609) has been fixed.
• Regressions in str representations of empty CRS objects and the handling of
  unreferenced datasets in rasterio._base have been fixed (#1616).
• GDAL seems to work best if GDAL_DATA is set as early as possible. Ideally it
  is set when building the library or in the environment before importing

... (truncated)

Commits

• 97298dd Make PROJ string valid
• 8be55b0 Set release date for 1.0.21
• 7c6e01f Set _wkt and _data in setstate
• 012d3fa Skip test that can't pass on 32-bit system
• bdac130 Bump version to 1.0.20, update change log
• 2d4ec8f Check for NULL
• 76e8bd3 Safer use of CPLFindFile
• 81dcc34 Update change log
• ff94da7 Check for data files at builtin locations (#1639)
• eedc18d First swing at resolving #1634 (#1638)
• Additional commits viewable in compare view

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[weiji14]

@dependabot ignore this minor version

[dependabot-preview]

OK, I won't notify you about version 1.0.x again, unless you re-open this PR or update to a 1.0.x release yourself.