Update docs and changelog

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 NA
 
+## 0.3.1 (2022-03-23)
+
+### Changed
+
+- Reduce number of dependencies (including when installing from the GitHub repository).
+  - Use `re` instead of `re2` for regular expressions.
+  - Drop some of the dev dependencies from the `opam` file.
+
 ## 0.3.0 (2022-03-18)
 
 ### Added

README.md

@@ -65,17 +65,29 @@ For information on installing and using `pyml_bindgen`, check out the [docs](htt
 
 Additionally, you can find examples in the [examples](https://github.com/mooreryan/ocaml_python_bindgen/tree/main/examples) directory. One neat thing about these examples is that you can see how to write Dune [rules](https://dune.readthedocs.io/en/stable/dune-files.html#rule) to automatically generate your `pyml` bindings.
 
-## Development
+## Installing from sources
+
+If you want to install from sources, e.g., to track the main branch or a development branch, but you do not want to install all the test and development packages, clone the repository, checkout the branch you want to follow and run opam install manually:
 
-If you want to work on `pyml_bindgen` development, you may want to install a couple of additional packages that are not specified in the `opam` file.
+```
+$ git clone https://github.com/mooreryan/ocaml_python_bindgen.git
+$ git checkout dev
+$ opam install .
+```
+
+This will save a lot of install time as it avoids some heavy packages.
+
+## Development
 
-- To run the benchmarks, you will need `core` and `core_bench`.
-- To run test instrumentation, you will need `bisect_ppx`.
+If instead, you want to work on `pyml_bindgen` development, will need to ensure you have the test dependencies, as well as a couple dependencies that are not included in the `opam` file (`core`, `core_bench`, and `bisect_ppx`.)
 
 E.g.,
 
 ```
+$ git clone https://github.com/mooreryan/ocaml_python_bindgen.git
+$ opam install . --deps-only --with-doc --with-test
 $ opam install core core_bench bisect_ppx
+$ dune build
 ```
 
 ## License