Finalize docs and README

Author: benjimaclellan

docs/how-to-guides.md

@@ -1,6 +1,6 @@
 # How-to: A hands-on guide
 
-<img src="https://raw.githubusercontent.com/graphiq-dev/graphiq/main/docs/img/fig1.png" width="400px" align="center">
+<img src="https://raw.githubusercontent.com/graphiq-dev/graphiq/main/docs/img/fig1.png" width="750px" align="center">
 Graphiq is useful for a variety of use-cases when design photonic quantum technologies.
 Here, we will walk a few examples use-cases of the software tools, starting with a simple example of simulating a
 quantum circuit, and then move on to more advanced use-cases.

docs/reference.md

@@ -1,3 +1,5 @@
 # API Reference
 
-<img src="https://raw.githubusercontent.com/graphiq-dev/graphiq/main/docs/img/fig2.png" width="750px" align="center">
+<div align="center">
+    <img src="https://raw.githubusercontent.com/graphiq-dev/graphiq/main/docs/img/fig2.png" width="400px" align="center">
+</div>

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "graphiq"
-version = "0.0.18"
+version = "0.0.20"
 
 requires-python = ">3.8, <4"
 dependencies = [