Release v0.20.3

package.json

@@ -1,7 +1,7 @@
 {
   "name": "sharp",
   "description": "High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP and TIFF images",
-  "version": "0.20.2",
+  "version": "0.20.3",
   "author": "Lovell Fuller <npm@lovell.info>",
   "homepage": "https://github.com/lovell/sharp",
   "contributors": [
@@ -88,14 +88,14 @@
     "prebuild-install": "^4.0.0",
     "semver": "^5.5.0",
     "simple-get": "^2.8.1",
-    "tar": "^4.4.2",
+    "tar": "^4.4.4",
     "tunnel-agent": "^0.6.0"
   },
   "devDependencies": {
-    "async": "^2.6.0",
+    "async": "^2.6.1",
     "cc": "^1.0.2",
     "decompress-zip": "^0.3.1",
-    "documentation": "^6.3.3",
+    "documentation": "^7.1.0",
     "exif-reader": "^1.0.2",
     "icc": "^1.0.0",
     "mocha": "^5.2.0",