Add support for fetching meta data from deps.dev

[n1ckl0sk0rtge]

Description

This PR adds basic capabilities to fetch meta data from deps.dev for a given PURL. With this code, only the related source code repositories will be fetched and stored.

• [X] I have read and understand the contributing guidelines
• [ ] This PR fixes a defect, and I have provided tests to verify that the fix is effective
• [X] This PR implements an enhancement, and I have provided tests to verify that it works as intended
• [ ] This PR introduces changes to the database model, and I have updated the migration changelog accordingly
• [ ] This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +18.16% (target: -1.00%)	:white_check_mark: 87.50% (target: 70.00%)

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (157837085392cd8dff421e152ab1ed58f7fc6070)	201	132	65.67%
Head commit (59c4b3562c550698fa8ddd29f91620be1ee7368b)	6923 (+6722)	5804 (+5672)	83.84% (+18.16%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#1457)	48	42	87.50%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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[nscuro]

Thanks @n1ckl0sk0rtge! I've not forgotten about this PR, I'll try to get it reviewed this weekend! Apologies for the delay.