v3.0.0

• chore: update package.json d013880
• 3.0.0-beta.2 4aa3c8f
• fix: middleware don't work 5fefeaa
• add debug info and test fixture b5fb896
• 3.0.0-beta.1 4e81ec3
• refact: migrate to umi@2 336d3db
• Merge pull request #2 from tudou527/master 74f1272
• fix: 2.0 中 beforeServerWithApp 已废弃，替换为 beforeDevServer fcde30d

27b0005...v3.0.0