fix(package): update changelog scripts [ci skip]

package.json

@@ -23,9 +23,11 @@
     "build:umd": "cross-env NODE_ENV=build gulp umd",
     "build:docs-toc": "doctoc ./.github/CONTRIBUTING.md --github --maxlevel 4",
     "build:docs-cname": "echo react.semantic-ui.com > docs/build/CNAME",
+    "build:changelog": "github_changelog_generator --max-issues 1000",
+    "deploy:changelog": "git add CHANGELOG.md && git commit -m 'docs(changelog): update changelog [ci skip]' && git push",
     "predeploy:docs": "cross-env NODE_ENV=production yarn build:docs && yarn build:docs-cname",
     "deploy:docs": "gh-pages -d docs/build -m 'deploy docs [ci skip]'",
-    "postdeploy:docs": "github_changelog_generator && gach 'docs(changelog): update changelog [ci skip]",
+    "postdeploy:docs": "yarn build:changelog && yarn deploy:changelog",
     "lint": "cross-env NODE_ENV=production eslint .",
     "lint:fix": "yarn lint -- --fix",
     "prerelease": "yarn lint && yarn tsd:lint && npm test && cross-env NODE_ENV=production yarn build",