Clean up workflows and add badges (#314)

.github/workflows/test.yml

@@ -43,7 +43,7 @@ jobs:
           hatch run cov:test
       - name: Coverage
         run: |
-          pip install codecov
+          pip install codecov coverage[toml]
           codecov
       - name: Check CLI
         run: |
@@ -59,13 +59,9 @@ jobs:
       - uses: actions/checkout@v3
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
         with:
-          python_version: "3.8"
-      - uses: jupyterlab/maintainer-tools/.github/actions/install-minimums@v1
-        with:
-          only_create_file: 1
+          dependency_type: minimum
       - name: Run the unit tests
         run: |
-          export PIP_CONSTRAINT="./contraints_file.txt"
           hatch run test:nowarn || hatch run test:nowarn --lf
 
   test_prereleases:
@@ -76,10 +72,9 @@ jobs:
       - uses: actions/checkout@v3
       - uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
         with:
-          python_version: "3.11"
+          dependency_type: pre
       - name: Run the tests
         run: |
-          export PIP_PRE=1
           hatch run test:nowarn || hatch run test:nowarn --lf
 
   test_docs:

README.md

@@ -1,5 +1,9 @@
 # Jupyter Core
 
+[![Build Status](https://github.com/jupyter/jupyter_core/actions/workflows/test.yml/badge.svg?query=branch%3Amain++)](https://github.com/jupyter/jupyter_core/actions/workflows/test.yml/badge.svg?query=branch%3Amain++)
+[![codecov](https://codecov.io/gh/jupyter/jupyter_core/branch/main/graph/badge.svg?token=IRZuxPXamU)](https://codecov.io/gh/jupyter/jupyter_core)
+[![Documentation Status](https://readthedocs.org/projects/jupyter-core/badge/?version=latest)](http://jupyter-core.readthedocs.io/en/latest/?badge=latest)
+
 Core common functionality of Jupyter projects.
 
 This package contains base application classes and configuration inherited by other projects.