update version to 0.5.0 (#172)

* typo fix in installation.rst

* update version

Author: kathyxchen

docs/source/overview/installation.rst

@@ -17,7 +17,7 @@ To install with conda (recommended for Linux users), run the following command i
 
    conda install -c bioconda selene-sdk
 
-Installing selene with pip:
+Installing selene with pip
 ---------------------------
 
 .. code-block:: sh

selene_sdk/version.py

@@ -1 +1 @@
-__version__ = "0.5.dev0"
+__version__ = "0.5.0"

setup.py

@@ -25,7 +25,7 @@
 cmdclass = {'build_ext': build_ext}
 
 setup(name="selene-sdk",
-      version="0.5.dev0",
+      version="0.5.0",
       long_description=long_description,
       long_description_content_type='text/markdown',
       description=("framework for developing sequence-level "