fix(vulnfeeds): add more phrases for extracting versions

[Harshit28j]

Overview

Fixes #249

This PR extends the version extraction regex in ExtractVersionsFromText to support additional common phrases found in CVE descriptions.

Details

Problem

The existing regex only matched through and before keywords, causing version information to be lost when CVE descriptions used other common phrasing.

Solution

Added support for the following phrases:

• up to and including (e.g., "versions 1.0 up to and including 2.3.4")
• prior to (e.g., "versions prior to 2.3.4")
• below (e.g., "versions below 2.3.4")
• and earlier (e.g., "version 2.3.4 and earlier")
• or older (e.g., "version 2.3.4 or older")
• and below (e.g., "version 2.3.4 and below")

The implementation uses two regex patterns:

1. Prefix pattern: For phrases where version comes after the keyword (before, prior to, below, etc.)
2. Trailing pattern: For phrases where version comes before the keyword (and earlier, or older, and below)

Testing

• Existing tests pass (go test -run TestExtractVersionInfo)
• Code formatted (go fmt ./...)
• Code vetted (go vet ./...)

[another-rex]

Please add real world examples of these different version formats, and add tests for them. (i.e. link to the CVEs, add them as test cases.)