Update azure-datalake-store requirement in /requirements (#849)

Updates the requirements on [azure-datalake-store](https://github.com/Azure/azure-data-lake-store-python) to permit the latest version.
- [Release notes](https://github.com/Azure/azure-data-lake-store-python/releases)
- [Changelog](https://github.com/Azure/azure-data-lake-store-python/blob/master/HISTORY.rst)
- [Commits](Azure/azure-data-lake-store-python@v0.0.30...v1.0.1)

---
updated-dependencies:
- dependency-name: azure-datalake-store
  dependency-version: 1.0.1
  dependency-type: direct:production
...

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requirements/azure.txt

@@ -1,6 +1,6 @@
 # newer versions require changes to authentication
 # see https://github.com/nteract/papermill/issues/825
-azure-datalake-store >= 0.0.30,<1.0.0a0
+azure-datalake-store >= 0.0.30,< 2.0.0
 azure-storage-blob >= 12.1.0
 requests >= 2.21.0
 azure-identity>=1.3.1