Reduce cyclomatic complexity for a method src/graph_populator.py:GraphPopulator.construct_package_query

```
src/graph_populator.py
    M 110:4 GraphPopulator.construct_version_query - E (34)
    M 270:4 GraphPopulator.construct_package_query - D (27)
    C 16:0 GraphPopulator - C (13)
```