Copy style-spec package.json dependencies to root

npm does not support subdirectories as dependencies in published packages.

package.json

@@ -14,30 +14,36 @@
   },
   "dependencies": {
     "@mapbox/gl-matrix": "^0.0.1",
-    "@mapbox/mapbox-gl-style-spec": "file:src/style-spec",
     "@mapbox/shelf-pack": "^3.0.0",
+    "@mapbox/tiny-sdf": "^1.1.0",
     "@mapbox/unitbezier": "^0.0.0",
     "@mapbox/whoots-js": "^3.0.0",
     "brfs": "^1.4.0",
     "bubleify": "^0.7.0",
+    "csscolorparser": "~1.0.2",
     "earcut": "^2.0.3",
+    "fast-stable-stringify": "^0.1.1",
     "geojson-rewind": "^0.1.0",
     "geojson-vt": "^2.4.0",
     "grid-index": "^1.0.0",
+    "jsonlint-lines-primitives": "~1.6.0",
+    "lodash.isequal": "^3.0.4",
     "mapbox-gl-supported": "^1.2.0",
+    "minimist": "0.0.8",
     "package-json-versionify": "^1.0.2",
     "pbf": "^1.3.2",
     "point-geometry": "^0.0.0",
     "quickselect": "^1.0.0",
+    "rw": "^1.3.3",
+    "sort-object": "^0.3.2",
     "supercluster": "^2.3.0",
     "through2": "^2.0.3",
     "tinyqueue": "^1.1.0",
     "unassertify": "^2.0.0",
     "unflowify": "^1.0.0",
     "vector-tile": "^1.3.0",
     "vt-pbf": "^2.0.2",
-    "webworkify": "^1.4.0",
-    "@mapbox/tiny-sdf": "^1.1.0"
+    "webworkify": "^1.4.0"
   },
   "devDependencies": {
     "@mapbox/mapbox-gl-rtl-text": "^0.1.1",

yarn.lock

@@ -10,17 +10,6 @@
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/@mapbox/mapbox-gl-rtl-text/-/mapbox-gl-rtl-text-0.1.1.tgz#1ceb3103cd668b16563b5492c0690c3f091c7491"
 
-"@mapbox/mapbox-gl-style-spec@file:src/style-spec":
-  version "9.0.0"
-  dependencies:
-    csscolorparser "~1.0.2"
-    fast-stable-stringify "^0.1.1"
-    jsonlint-lines-primitives "~1.6.0"
-    lodash.isequal "^3.0.4"
-    minimist "0.0.8"
-    rw "^1.3.3"
-    sort-object "^0.3.2"
-
 "@mapbox/mapbox-gl-test-suite@file:test/integration":
   version "0.0.0"
   dependencies: