update dependencies to latest

- `eslint` to 7.x
- `mocha` to 8.x
- `uuid` to 8.x
- `loopback-connector` to 5.x

Signed-off-by: Miroslav Bajtoš <mbajtoss@gmail.com>

Author: bajtos

.mocharc.json

@@ -0,0 +1,6 @@
+{
+  "reporter": "spec",
+  "timeout": 10000,
+  "require": "test/init.js",
+  "exit": true
+}

package.json

@@ -31,19 +31,19 @@
     "bluebird": "^3.4.6",
     "chalk": "^4.0.0",
     "debug": "^4.1.1",
-    "loopback-connector": "^4.10.2",
+    "loopback-connector": "^5.0.0",
     "pg": "^8.0.2",
     "strong-globalize": "^6.0.0",
-    "uuid": "^7.0.3"
+    "uuid": "^8.3.0"
   },
   "devDependencies": {
-    "eslint": "^6.0.1",
+    "eslint": "^7.7.0",
     "eslint-config-loopback": "^13.1.0",
     "juggler-v3": "file:./deps/juggler-v3",
     "juggler-v4": "file:./deps/juggler-v4",
     "lodash": "^4.17.4",
     "loopback-datasource-juggler": "^3.0.0 || ^4.0.0",
-    "mocha": "^7.1.1",
+    "mocha": "^8.1.2",
     "rc": "^1.0.0",
     "should": "^13.2.3",
     "sinon": "^9.0.2"