Once again fight RTD to install the package

.readthedocs.yml

@@ -6,11 +6,3 @@ build:
 sphinx:
   configuration: documentation/source/conf.py
   fail_on_warning: true
-
-python:
-  version: 3.7
-  install:
-  - method: pip
-    path: .
-    extra_requirements:
-      - docs

documentation/source/conf.py

@@ -6,3 +6,4 @@ master_doc = 'index'
 project = 'hypercore-crypto'
 templates_path = ['_templates']
 extensions = ['sphinx.ext.autodoc', 'sphinx_autodoc_typehints']
+autodoc_mock_imports = ['pysodium']  # no libsodium in the RTD environment