MNT: Set minimum pydicom to 1.0.1

Pydicom<1 used the setuptools' ``use_2to3`` option to achieve Python 3
compatiblity. Setuptools has removed lib2to3 in
pypa/setuptools#2731, which causes our minimum
requirements tests to fail.

Author: effigies

setup.cfg

@@ -37,7 +37,7 @@ packages = find:
 
 [options.extras_require]
 dicom =
-    pydicom >=0.9.9
+    pydicom >=1.0.0
 dicomfs =
     %(dicom)s
     pillow

tools/ci/env.sh

@@ -9,7 +9,7 @@ DEFAULT_OPT_DEPENDS="scipy matplotlib pillow pydicom h5py indexed_gzip"
 # pydicom has skipped some important pre-releases, so enable a check against master
 PYDICOM_MASTER="git+https://github.com/pydicom/pydicom.git@master"
 # Minimum versions of optional requirements
-MIN_OPT_DEPENDS="matplotlib==1.5.3 pydicom==0.9.9 pillow==2.6"
+MIN_OPT_DEPENDS="matplotlib==1.5.3 pydicom==1.0.1 pillow==2.6"
 
 # Numpy and scipy upload nightly/weekly/intermittent wheels
 NIGHTLY_WHEELS="https://pypi.anaconda.org/scipy-wheels-nightly/simple"