Bump grey-group fork v number

Author: ml-evs

setup.py

@@ -18,7 +18,7 @@
     install_requires=['numpy', 'pandas', 'scipy', 'galvani >= 0.4.1', 'matplotlib', 'openpyxl', 'NewareNDA'],
     tests_require=['pytest'],
     # *strongly* suggested for sharing
-    version='0.1.5',
+    version='0.1.8',
     # The license can be anything you like
     license='MIT',
     description='Package for processing and plotting echem data from cyclers',