fix: version should be set by pyproject.toml

`aries_cloudagent.version.__version__` was out of sync with the version
listed in the pyproject.toml file. The pyproject.toml file should be the
source of truth as it will be used when publishing using poetry.
However, `__version__` is used in code for some operations. To ensure
that the pyproject file and the `__version__` can't get out of sync,
`aries_cloudagent.version` will now read the version from the pyproject
file. This read will only take place once on first import.

To acheive this, I added `tomli` as a dependency, but only if the python
version is < 3.11. If 3.11 is in use, the `tomlib` library will be used,
which was added as a python standard library module in 3.11.

Signed-off-by: Daniel Bluhm <dbluhm@pm.me>

aries_cloudagent/version.py

@@ -1,4 +1,12 @@
 """Library version information."""
 
-__version__ = "0.10.1"
+try:
+    import tomlib
+except ModuleNotFoundError:
+    import tomli as tomlib
+
+with open("pyproject.toml", "rb") as pyproject_file:
+    pyproject = tomlib.load(pyproject_file)
+
+__version__ = pyproject["tool"]["poetry"]["version"]
 RECORD_TYPE_ACAPY_VERSION = "acapy_version"

pyproject.toml

@@ -1,7 +1,7 @@
 [tool.poetry]
 name = "aries_cloudagent"
-version = "0.10.0-rc0"
-description = ""
+version = "0.10.1"
+description = "Hyperledger Aries Cloud Agent Python (ACA-Py) is a foundation for building decentralized identity applications and services running in non-mobile environments. "
 authors = ["Hyperledger Aries <aries@lists.hyperledger.org>"]
 license = "Apache-2.0"
 readme = "README.md"
@@ -51,6 +51,7 @@ unflatten="~0.1"
 asyncpg = ">=0.25.0,<0.26.0"
 web-py = ">=0.62,<1.0"
 pygments = ">=2.10,<3.0"
+tomli = {version = "^2.0.1", python = "<3.11"}
 
 # askar
 aries-askar= { version = "~0.2.5", optional = true }