Update dependencies.

Author: davidlehn

package.json

@@ -33,18 +33,18 @@
     "canonicalize": "^1.0.1",
     "rdf-canonize": "^1.0.2",
     "request": "^2.88.0",
-    "semver": "^5.6.0",
+    "semver": "^6.3.0",
     "xmldom": "0.1.19"
   },
   "devDependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.3.3",
-    "@babel/plugin-proposal-object-rest-spread": "^7.3.2",
-    "@babel/plugin-transform-modules-commonjs": "^7.2.0",
-    "@babel/plugin-transform-runtime": "^7.2.0",
-    "@babel/preset-env": "^7.3.1",
-    "@babel/register": "^7.0.0",
-    "@babel/runtime": "^7.3.1",
+    "@babel/cli": "^7.7.5",
+    "@babel/core": "^7.7.5",
+    "@babel/plugin-proposal-object-rest-spread": "^7.7.4",
+    "@babel/plugin-transform-modules-commonjs": "^7.7.5",
+    "@babel/plugin-transform-runtime": "^7.7.5",
+    "@babel/preset-env": "^7.7.5",
+    "@babel/register": "^7.7.4",
+    "@babel/runtime": "^7.7.5",
     "babel-loader": "^8.0.5",
     "benchmark": "^2.1.4",
     "browserify": "^16.2.3",
@@ -53,10 +53,10 @@
     "core-js": "^2.6.5",
     "cors": "^2.7.1",
     "cross-env": "^5.2.0",
-    "eslint": "^5.14.1",
-    "eslint-config-digitalbazaar": "^1.6.0",
+    "eslint": "^6.7.2",
+    "eslint-config-digitalbazaar": "^2.0.1",
     "express": "^4.16.4",
-    "fs-extra": "^7.0.0",
+    "fs-extra": "^8.1.0",
     "join-path-js": "0.0.0",
     "karma": "^3.1.1",
     "karma-babel-preprocessor": "^8.0.0",
@@ -72,9 +72,9 @@
     "karma-sourcemap-loader": "^0.3.7",
     "karma-tap-reporter": "0.0.6",
     "karma-webpack": "^3.0.5",
-    "mocha": "^5.2.0",
+    "mocha": "^6.2.2",
     "mocha-lcov-reporter": "^1.3.0",
-    "nyc": "^13.3.0",
+    "nyc": "^14.1.1",
     "webpack": "^4.29.5",
     "webpack-cli": "^3.2.3",
     "webpack-merge": "^4.2.1"