update minimum versions of packages

Author: Evidlo

README.rst

@@ -19,7 +19,15 @@ This library allows you to write entries to a KeePass database.
 Come chat at `#pykeepass`_ on Freenode or `#pykeepass:matrix.org`_ on Matrix.
 
 .. _#pykeepass: irc://irc.freenode.net
-.. _#pykeepass\:matrix.org: https://matrix.to/#/%23pykeepass:matrix.org 
+.. _#pykeepass\:matrix.org: https://matrix.to/#/%23pykeepass:matrix.org
+
+Installation
+------------
+
+.. code::
+
+   sudo apt install python3-lxml
+   pip install pykeepass
 
 Example
 -------

pyproject.toml

@@ -9,9 +9,9 @@ authors = [
 license = {text = "GPL-3.0"}
 keywords = ["vault", "keepass"]
 dependencies = [
-    "python-dateutil",
-    "construct",
-    "argon2_cffi",
+    "python-dateutil>=2.7.0",
+    "construct>=2.10.53",
+    "argon2_cffi>=18.1.0",
     "pycryptodomex>=3.6.2",
     "lxml",
 ]