chore: update dependencies to latest

regular deps:
- `async` to `^3.2.0`
- `debug` to `^4.1.1`
- `loopback-connector` to `^5.0.0`
- `strong-globalize` to `^6.0.4`

dev deps:

- `should` to `^13.2.3`
- `sinon` to `^9.0.3`

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

package.json

@@ -20,12 +20,12 @@
     "setup.sh"
   ],
   "dependencies": {
-    "async": "^2.6.1",
-    "debug": "^3.1.0",
+    "async": "^3.2.0",
+    "debug": "^4.1.1",
     "lodash": "^4.17.11",
-    "loopback-connector": "^4.0.0",
+    "loopback-connector": "^5.0.0",
     "mysql": "^2.11.1",
-    "strong-globalize": "^5.0.5"
+    "strong-globalize": "^6.0.4"
   },
   "devDependencies": {
     "bluebird": "~2.9.10",
@@ -36,8 +36,8 @@
     "loopback-datasource-juggler": "^3.0.0 || ^4.0.0",
     "mocha": "^6.2.2",
     "rc": "^1.0.0",
-    "should": "^8.0.2",
-    "sinon": "^1.15.4"
+    "should": "^13.2.3",
+    "sinon": "^9.0.3"
   },
   "repository": {
     "type": "git",