v1.5.6

Changelog

• f93f786 Merge pull request #173 from safedep/feat/dependency-graph
• 774323c Merge pull request #187 from safedep/feat/npm-graph-parser
• c0f9848 Merge pull request #190 from safedep/feat/cyclonedx-parser-handle-dependency-relation
• be81848 feat: Add data structure to build dependency graph
• b662145 feat: Refactor CycloneDX parser into CycloneDX Graph Parser
• debca42 fix: purl parser bug to handle maven group:name convention
• d0f6a82 refactor: Allow parser configuration
• 1dba6fd refactor: Parser to use dependency graph parsers
• 6f3c5ad refactor: Simplify load_exceptions function