bump power-assert dependencies.

See: power-assert-js/babel-plugin-espower#8

Author: jamestalmage

package.json

@@ -63,21 +63,21 @@
     "arr-flatten": "^1.0.1",
     "ava-init": "^0.1.0",
     "babel-core": "^5.8.23",
-    "babel-plugin-espower": "^1.0.0",
+    "babel-plugin-espower": "^1.1.0",
     "babel-runtime": "^5.8.29",
     "bluebird": "^3.0.0",
     "chalk": "^1.0.0",
     "co": "floatdrop/co#e6c2a50",
     "core-assert": "^0.1.0",
-    "empower": "^1.0.2",
+    "empower": "^1.1.0",
     "figures": "^1.4.0",
     "fn-name": "^2.0.0",
     "globby": "^3.0.1",
     "has-flag": "^1.0.0",
     "is-generator": "^1.0.2",
     "meow": "^3.3.0",
     "plur": "^2.0.0",
-    "power-assert-formatter": "^1.1.0",
+    "power-assert-formatter": "^1.3.0",
     "power-assert-renderers": "^0.1.0",
     "pretty-ms": "^2.0.0",
     "require-from-string": "^1.0.0",