added unit tests badge to readme and updated its contents; added .coverage to ignored and updated reqs

Author: wegar-2

.gitignore

@@ -6,3 +6,4 @@ moddata/data/archive.zip
 moddata/data/btc.parquet
 moddata/data/stooq_data/
 sandbox.py
+.coverage

README.md

@@ -1,5 +1,8 @@
 # moddata
 
+![CI](https://github.com/wegar-2/moddata/actions/workflows/python-tests.yml/badge.svg)
+![Python](https://img.shields.io/pypi/pyversions/moddata)
+
 Provides data for use in modeling.
 
 Interface consists of a single function ```load_data```. It accepts 
@@ -11,9 +14,19 @@ List of currently available datasets:
 3. `pl_banking_stocks` - daily prices of stocks of select 
 Polish banks for period 2005-01-01 through 2024-12-31 
 (data source: [stooq.com](https://stooq.com/))
-4. 
+
 
 To install this package run:
 ```
 pip install git+https://github.com/wegar-2/moddata.git@main
+```
+
+Run unit tests from the main package directory with:
+```
+pytest
+```
+
+Check tests coverage with:
+```
+pytest --cov=moddata tests/
 ```

requirements.txt

@@ -1,6 +1,7 @@
 annotated-types==0.7.0
 certifi==2025.4.26
 charset-normalizer==3.4.2
+coverage==7.8.2
 cramjam==2.10.0
 fastparquet==2024.11.0
 fsspec==2025.5.0
@@ -16,6 +17,7 @@ pyarrow==20.0.0
 pydantic==2.11.5
 pydantic_core==2.33.2
 pytest==8.3.5
+pytest-cov==6.1.1
 python-dateutil==2.9.0.post0
 pytz==2025.2
 PyYAML==6.0.2