Add openpxyl according to #30 (#45)

Author: raethlein

projects.yaml

@@ -2751,6 +2751,14 @@ projects:
     conda_id: conda-forge/pandas-datareader
     labels: ["pandas"]
     category: data-loading
+  - name: openpyxl
+    pypi_id: openpyxl
+    gitlab_id: "https://foss.heptapod.net/api/graphql::openpyxl/openpyxl"
+    conda_id: openpyxl
+    dockerhub_id: "openpyxl/openpyxl-ci"
+    docs_url: https://openpyxl.readthedocs.io/en/stable/
+    license: MIT
+    category: data-loading
   - name: TensorFlow Datasets
     pypi_id: tensorflow-datasets
     github_id: tensorflow/datasets