Remove keyring tag - zenroom improvements/fixes (#291)

* removed keyring tag from zenroom tests
* removed keyring tag mishandling (zenroom) from cryptoconditions. using cyptoconditions 1.1.0 from now on
* fixed doc-build
* fixed docstring issue
* removed doc-building workflow and tox usage
* fixed import issue
* fixed connectionerror obj resolution in tests

Signed-off-by: Jürgen Eckel <juergen@riddleandcode.com>

.github/workflows/documenation.yml

@@ -1,35 +0,0 @@
-# Copyright © 2020 Interplanetary Database Association e.V.,
-# Planetmint and IPDB software contributors.
-# SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
-# Code is Apache-2.0 and docs are CC-BY-4.0
-
-name: Documentation
-on: [push, pull_request]
-
-jobs:
-  documentation:
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Check out repository code
-        uses: actions/checkout@v3
-
-      - name: Setup python
-        uses: actions/setup-python@v4
-        with:
-          python-version: 3.9
-
-      - name: Install tox
-        run: python -m pip install --upgrade tox tox-gh-actions
-
-      - name: Install dependencies
-        run: pip install .'[dev]'
-
-      - name: Run tox
-        run: tox -e docsroot
-
-        
-
-      
-
-