bump to v0.20.0

Author: nornagon

package.json

@@ -2,7 +2,7 @@
   "main": "./lib/minidump.js",
   "name": "minidump",
   "description": "Read and process minidump file",
-  "version": "0.19.0",
+  "version": "0.20.0",
   "bin": {
     "minidump_stackwalk": "build/src/processor/minidump_stackwalk",
     "minidump_dump": "build/src/processor/minidump_dump"