Release Candidate 2 for version 2.0.0 of the SPDX Java Tools

What's Changed

• See the SPDX Java Library release notes for notes on the library changes
• Fix typos in variable and protected method names by @bact in #177
• Fix typo for DOWNLOAD_FIELD_TEXT value by @bact in #176
• Update schemas to the 3.0.1 released version by @goneall in #178
• Remove unused code + add asserts in OwlToXSDTest.java test case by @bact in #174
• Handle null before access to creation info / license info by @bact in #175
• Initialize models in the Main by @goneall in #179
• Update versions for SPDX libraries by @goneall in #187

New Contributors

• @bact made their first contribution in #177

Full Changelog: v2.0.0-RC1...v2.0.0-RC2