v0.4.0

What's Changed

• Bump up version by @y0z in #98
• Fix the condition for stats report to count the default load_module stats by @nabenabe0928 in #99
• Fix sampler tutorial by @y0z in #102
• Add conda-forge installation by @y0z in #103
• Exclude tests which use GitHub API by @fusawa-yugo in #106
• Change the internal behavior of force-reloading by @y0z in #107
• Fix typo in docs by @fusawa-yugo in #109
• Add tutorial in docs about how to use benchmarks by @fusawa-yugo in #110
• Update README and docs by @y0z in #111
• Update NEWS by @y0z in #115
• Add OptunaHub citation by @nabenabe0928 in #112
• Add CITATION.cff by @y0z in #113
• Add reference to documentation by @y0z in #114
• Bump up to version number 0.4.0 by @nabenabe0928 in #117

Full Changelog: v0.3.1...v0.4.0