hotfix(dependencies): set fixed version for pelican package

Temporary fix for #11 

* bump version to 1.1.1

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = pelican-data-files
-version = 1.1.0
+version = 1.1.1
 url = https://github.com/LucasVanHaaren/pelican-data-files
 # download_url = https://github.com/LucasVanHaaren/pelican-data-files
 author = vhash
@@ -26,14 +26,14 @@ python_requires = >= 3.6
 setup_requires =
     setuptools >=38.3.0     # version with most `setup.cfg` bugfixes
 install_requires =
-    pelican>=4.5
+    pelican==4.5.1
 
 [options.extras_require]
 dev =
-	flake8
+    flake8
     black
     invoke
-	twine
+    twine
 
 [options.entry_points]
 console_scripts =