fix: downgrade and lock lerna version for workaround

- see lerna/lerna#2348


Former-commit-id: f83304f466552ec7b94ccc006080267e691ceeac [formerly ee0e6a738462bad2bfc6bde8546516b4af340a45] [formerly bd0cec2873ce0946d3e89d4028caeebe06919745 [formerly af148f6]]
Former-commit-id: 61c0db9c7f8a49590da56272259985b9dea03557 [formerly a4f2a07]
Former-commit-id: 8bd63fb

package.json

@@ -38,7 +38,7 @@
     "husky": "^3.0.9",
     "jest": "^24.9.0",
     "jest-raw-loader": "^1.0.1",
-    "lerna": "3.18.4",
+    "lerna": "3.17.0",
     "prettier": "^1.19.0",
     "pretty-quick": "^2.0.1",
     "rimraf": "^3.0.0",

packages/theme-react/package.json

@@ -20,17 +20,16 @@
     "github-markdown-css": "^3.0.1",
     "highlight.js": "^9.16.2",
     "lozad": "^1.14.0",
-    "react": "^16.11.0",
-    "react-disqus-components": "^1.2.0",
-    "react-dom": "^16.11.0",
+    "react": "^16.12.0",
+    "react-dom": "^16.12.0",
+    "react-disqus-components": "^1.2.1",
     "react-helmet": "^5.2.1",
     "react-router-dom": "^5.1.2",
     "smooth-scroll": "^16.1.0",
-    "typeface-noto-serif-sc": "^0.0.75",
     "typeface-roboto": "^0.0.75"
   },
   "devDependencies": {
-    "@testing-library/react": "^9.3.0",
+    "@testing-library/react": "^9.3.2",
     "@types/gulp": "^4.0.6",
     "@types/jest": "^24.0.20",
     "@types/node": "^12.7.5",