Merge pull request #394 from embark-framework/update-solc-0.4.23

Update templates to solc version 0.4.23 to prevent issue with loading library.

Author: iurimatias

templates/boilerplate/embark.json

@@ -10,7 +10,7 @@
   "config": "config/",
   "versions": {
     "web3": "1.0.0-beta",
-    "solc": "0.4.17",
+    "solc": "0.4.23",
     "ipfs-api": "17.2.4"
   },
   "plugins": {}

templates/demo/embark.json

@@ -9,7 +9,7 @@
   "config": "config/",
   "versions": {
     "web3": "1.0.0-beta",
-    "solc": "0.4.17",
+    "solc": "0.4.23",
     "ipfs-api": "17.2.4"
   },
   "plugins": {

templates/simple/embark.json

@@ -10,7 +10,7 @@
     "webserver": false
   },
   "versions": {
-    "solc": "0.4.17"
+    "solc": "0.4.23"
   },
   "plugins": {}
 }