chore(package.json): bump dependencies (#59)

Trying to fix: js-yaml (nodeca/js-yaml#475 / nodeca/js-yaml#480)

package.json

@@ -8,34 +8,34 @@
   },
   "dependencies": {
     "babel-plugin-styled-components": "^1.8.0",
-    "core-js": "^3.1.2",
+    "core-js": "^3.1.3",
     "disqus-react": "^1.0.5",
-    "gatsby": "^2.7.1",
-    "gatsby-image": "^2.1.0",
+    "gatsby": "^2.9.4",
+    "gatsby-image": "^2.1.4",
     "gatsby-plugin-compile-es6-packages": "^1.1.0",
-    "gatsby-plugin-feed": "2.2.1",
-    "gatsby-plugin-google-analytics": "2.0.20",
+    "gatsby-plugin-feed": "2.2.3",
+    "gatsby-plugin-google-analytics": "2.0.21",
     "gatsby-plugin-manifest": "^2.1.1",
-    "gatsby-plugin-offline": "^2.1.1",
+    "gatsby-plugin-offline": "^2.1.3",
     "gatsby-plugin-page-creator": "^2.0.13",
     "gatsby-plugin-react-helmet": "^3.0.12",
-    "gatsby-plugin-sharp": "^2.1.0",
+    "gatsby-plugin-sharp": "^2.1.5",
     "gatsby-plugin-styled-components": "^3.0.4",
-    "gatsby-remark-autolink-headers": "^2.0.12",
-    "gatsby-remark-copy-linked-files": "^2.0.12",
-    "gatsby-remark-images": "^3.0.12",
-    "gatsby-remark-prismjs": "^3.2.9",
+    "gatsby-remark-autolink-headers": "^2.0.18",
+    "gatsby-remark-copy-linked-files": "^2.0.13",
+    "gatsby-remark-images": "^3.0.16",
+    "gatsby-remark-prismjs": "^3.2.11",
     "gatsby-remark-responsive-iframe": "^2.1.1",
     "gatsby-remark-smartypants": "^2.0.8",
-    "gatsby-source-filesystem": "^2.0.37",
+    "gatsby-source-filesystem": "^2.0.39",
     "gatsby-transformer-remark": "^2.3.12",
-    "gatsby-transformer-sharp": "^2.1.19",
+    "gatsby-transformer-sharp": "^2.1.21",
     "lodash": "^4.17.5",
     "prismjs": "^1.16.0",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "react-helmet": "^5.2.1",
-    "styled-components": "^4.2.0"
+    "styled-components": "^4.3.1"
   },
   "peerDependencies": {
     "gatsby": "^2.7.1",
@@ -46,9 +46,9 @@
     "eslint": "^5.16.0",
     "eslint-plugin-react": "^7.13.0",
     "lighthousebot": "https://github.com/GoogleChromeLabs/lighthousebot",
-    "prettier": "^1.17.1",
+    "prettier": "^1.18.2",
     "puppeteer": "^1.17.0",
-    "semantic-release": "^15.13.12",
+    "semantic-release": "^15.13.16",
     "yaml": "^1.6.0"
   },
   "homepage": "https://github.com/maxpou/gatsby-starter-morning-dew#readme",