Release 15.0.1

• Update gulp-shared-tasks (bb950ca)
• Update lock file (6b66c89)
• Add dependency: ava@1.2.1 (9a001eb)
• Use itself (8eeac9f)
• Update lock file (6903686)
• Remove unused dependencies (bcc7eee)
• Use gulp-shared-tasks (03265b9)
• Add gulp-shared-tasks (2d9e498)
• Remove main task (8873823)
• Fix gulp test (afba874)
• Add main Gulp task (5d5862e)
• Fix gulpfile.babel.js linting (8f6f5bd)
• Add gulp test (4e6c7b7)
• Add gulp checkCoverage (a202145)
• Add smoke test (d98cd8c)
• Add dummy test (5dbefeb)
• Add gulp unit (6fdeae3)
• Refactoring (b3e4530)
• Add gulp check (8d9df65)
• Improve gulp build (4dd6551)
• Fix gulp build (2d01ac0)
• Add gulp build (a2cb235)
• Add dependency: gulp-ignore@ (f1cb510)
• Revert installing gulp-match (4279711)
• Add dependency: gulp-match@1.0.3 (1b13b29)
• Add gulp buildwatch (5083e65)
• Add dependency: @babel/runtime@7.3.1 (dac894b)
• Add dependency: @babel/preset-env@7.3.1 (b053a57)
• Add dependency: @babel/plugin-transform-runtime@7.2.0 (0bb6950)
• Add dependency: execa@1.0.0 (8edcaa9)
• Add empty CHANGELOG (19dbd91)
• Update .travis.yml (020b2ea)
• Add .travis.yml (f54c82f)
• Update .release-it.json (6cbbe99)
• Fix .gitignore (da8c706)
• Add .babelrc (ea39cf9)
• Add dependency: husky@1.3.1 (7e6c4e5)
• Improve package.json (f7692bd)
• Add Babel to gulpfile (3940895)
• Upgrade Node.js 11.9.0 -> 11.10.0 (c82ba2c)
• Update lock file (c1e5b7d)