Pipenv/fix install loguru (#732)

* update pipfile

* pipenv workflow

* pipfile jinja

* Pipfile installs dev files

* python3.8 tests only

* version tag yaml

* all tests

* pipenv with pip

* only 3.7

* activate env

* test-pipenv

* pipenv importlib_metadata

* importlib-metadata

* 3.8

* 3.7 only oops

* merge install guides

* install guide in README

Pipfile

@@ -28,7 +28,7 @@ asyncio = "*"
 fastapi = "*"
 uvicorn = {extras = ["standard"], version = "*"}
 sse-starlette = "*"
-jinja2 = "3.0.1"
+jinja2 = "==3.0.1"
 pyngrok = "*"
 secp256k1 = "*"
 pycryptodomex = "*"
@@ -37,4 +37,7 @@ pycryptodomex = "*"
 black = "==20.8b1"
 pytest = "*"
 pytest-cov = "*"
-mypy = "latest"
+mypy = "*"
+pytest-asyncio = "*"
+requests = "*"
+mock = "*"