read version from Cargo.toml

.gitignore

@@ -4,3 +4,4 @@
 /*.sqlite3
 docs/*/build/
 dev_config.toml
+Pipfile*

docs/requirements.txt

@@ -0,0 +1,2 @@
+sphinx
+tomlkit

docs/source/conf.py

@@ -5,11 +5,15 @@
 
 # -- Project information -----------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information
+from pathlib import Path
+from tomlkit import parse
+
+_cargo_toml = Path(__file__).resolve().parent.parent.parent / 'Cargo.toml'
 
 project = 'Tiempo'
 copyright = '2022, Categulario'
 author = 'Categulario'
-release = '1.4.1'
+release = str(parse(open(_cargo_toml).read())['package']['version'])
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration