pin dependencies

package.json

@@ -30,25 +30,25 @@
   },
   "homepage": "https://github.com/jeff-zucker/solid-rest#readme",
   "dependencies": {
-    "concat-stream": "^2.0.0",
-    "cross-fetch": "^3.0.6",
-    "fs-extra": "^9.0.1",
-    "mime-types": "^2.1.27",
+    "concat-stream": "2.0.0",
+    "cross-fetch": "3.0.6",
+    "fs-extra": "9.0.1",
+    "mime-types": "2.1.27",
     "uuid": "8.3.1"
   },
   "peerDependencies": {
-    "browserfs": "^1.4.3"
+    "browserfs": "1.4.3"
   },
   "devDependencies": {
     "babel-core": "6.26.3",
     "babel-preset-es2015": "6.24.1",
     "babel-preset-stage-0": "6.24.1",
     "minimist": "1.2.5",
-    "node-fetch": "^2.6.1",
-    "node-forge": "^0.10.0",
-    "rdflib": "^2.1.1",
+    "node-fetch": "2.6.1",
+    "node-forge": "0.10.0",
+    "rdflib": "2.1.1",
     "rimraf": "3.0.2",
-    "webpack": "^4.44.2",
-    "webpack-cli": "^4.2.0"
+    "webpack": "4.44.2",
+    "webpack-cli": "4.2.0"
   }
 }