Bump metro@0.45.1

Summary:
This version of metro contains experimental support for inlining import statements, which will unblock RAM bundling for opensource users that use imports, yay!!!

Publishing as a minor version, since there are no breaking changes. This way, this will also be available already in RN 0.57, since it depends on Metro 0.57 (https://fburl.com/t2j2k2sw).

/cc @[805780135:Eli White], @[1268286274:David Vacca], @[121800083:Héctor Ramos]

Reviewed By: mjesun

Differential Revision: D9682357

fbshipit-source-id: ddd450649e55ee37701667cdff0e81165875e76d

package.json

@@ -170,10 +170,10 @@
     "graceful-fs": "^4.1.3",
     "inquirer": "^3.0.6",
     "lodash": "^4.17.5",
-    "metro": "^0.45.0",
-    "metro-babel-register": "^0.45.0",
-    "metro-core": "^0.45.0",
-    "metro-memory-fs": "^0.45.0",
+    "metro": "^0.45.1",
+    "metro-babel-register": "^0.45.1",
+    "metro-core": "^0.45.1",
+    "metro-memory-fs": "^0.45.1",
     "mime": "^1.3.4",
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",