Envolved

Changed
* Env Vars no longer default to case sensitive if not uppercase.
Added
* Env vars can now be supplied with `prefix_capture`, causing them to become a prefix env var.
* all env vars can now be supplied with the optional `description` keyword argument.
* `describe_env_vars` to make a best-effort attempt to describe all the environment variables defined.
* `raise_for_partial` parameter for schema vars, to not accept partially filled schemas, regardless of default value.

Removed
* The caching mechanism from basic vars has been removed

Removed
* `env_parser.reload`- the parser is now self-updating!
* `MappingEnvVar`- use `Schema(dict, ...)` instead
* The same envvar cannot be used twice in the same schema anymore
Added
* The environment parsing is now self-updating, no more need to manually reload the environment when testing.
* When manifesting `EnvVar`s, additional keyword arguments can be provided.
* When creating a schema, you can now omit the factory type to just use a `SimpleNamespace`.
* Validators can now be used inside a schema class.
* Validators can now be static methods.
* EnvVar children can now overwrite template parameters.
* EnvVar template can be without a name.
* `BoolParser`'s parameters now all have default values.
Fixed
* Inner variables without a default value would act as though given a default value.
* If the variadic annotation of `__new__` and `__init__` would disagree, we would have `__new__`'s win out, this has been corrected.
* `EnvVar` is now safe to use both as a parent and as a manifest
* EnvVar validators now correctly transition to children
Internal
* added examples page

Fixed
* removed recordclasses dependency

* initial release