Bump angular-tree-component from 8.5.2 to 8.5.6

Bumps [angular-tree-component](https://github.com/500tech/angular-tree-component) from 8.5.2 to 8.5.6.
- [Release notes](https://github.com/500tech/angular-tree-component/releases)
- [Changelog](https://github.com/CirclonGroup/angular-tree-component/blob/master/CHANGELOG.md)
- [Commits](https://github.com/500tech/angular-tree-component/compare/8.5.2...8.5.6)

---
updated-dependencies:
- dependency-name: angular-tree-component
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package-lock.json

@@ -3514,25 +3514,18 @@
       "dev": true
     },
     "angular-tree-component": {
-      "version": "8.5.2",
-      "resolved": "https://registry.npmjs.org/angular-tree-component/-/angular-tree-component-8.5.2.tgz",
-      "integrity": "sha512-3NwMB+vLq1+WHz2UVgsZA73E1LmIIWJlrrasCKXbLJ3S7NmY9O/wKcolji3Vp2W//5KQ33RXu1jiPXCOQdRzVA==",
+      "version": "8.5.6",
+      "resolved": "https://registry.npmjs.org/angular-tree-component/-/angular-tree-component-8.5.6.tgz",
+      "integrity": "sha512-cxNem6872diZz9kIGqrjSJbKt0P3WSq9wTqZIeVJ8zsddI4Y6ShAVZlZNXUMRyJq246c9pJ6JJEAOzKVLk9xgA==",
       "requires": {
         "lodash": "^4.17.11",
-        "mobx": "^5.14.2",
-        "mobx-angular": "3.0.3",
-        "opencollective-postinstall": "^2.0.2"
+        "mobx": "^4.15.1"
       },
       "dependencies": {
         "mobx": {
-          "version": "5.15.4",
-          "resolved": "https://registry.npmjs.org/mobx/-/mobx-5.15.4.tgz",
-          "integrity": "sha512-xRFJxSU2Im3nrGCdjSuOTFmxVDGeqOHL+TyADCGbT0k4HHqGmx5u2yaHNryvoORpI4DfbzjJ5jPmuv+d7sioFw=="
-        },
-        "mobx-angular": {
-          "version": "3.0.3",
-          "resolved": "https://registry.npmjs.org/mobx-angular/-/mobx-angular-3.0.3.tgz",
-          "integrity": "sha512-mZuuose70V+Sd0hMWDElpRe3mA6GhYjSQN3mHzqk2XWXRJ+eWQa/f3Lqhw+Me/Xd2etWsGR1hnRa1BfQ2ZDtpw=="
+          "version": "4.15.7",
+          "resolved": "https://registry.npmjs.org/mobx/-/mobx-4.15.7.tgz",
+          "integrity": "sha512-X4uQvuf2zYKHVO5kRT5Utmr+J9fDnRgxWWnSqJ4oiccPTQU38YG+/O3nPmOhUy4jeHexl7XJJpWDBgEnEfp+8w=="
         }
       }
     },
@@ -10726,11 +10719,6 @@
         "is-wsl": "^2.1.0"
       }
     },
-    "opencollective-postinstall": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/opencollective-postinstall/-/opencollective-postinstall-2.0.2.tgz",
-      "integrity": "sha512-pVOEP16TrAO2/fjej1IdOyupJY8KDUM1CvsaScRbw6oddvpQoOfGk4ywha0HKKVAD6RkW4x6Q+tNBwhf3Bgpuw=="
-    },
     "opn": {
       "version": "5.5.0",
       "resolved": "https://registry.npmjs.org/opn/-/opn-5.5.0.tgz",
@@ -11931,7 +11919,8 @@
         },
         "ansi-regex": {
           "version": "5.0.0",
-          "resolved": "",
+          "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.0.tgz",
+          "integrity": "sha512-bY6fj56OUQ0hU1KjFNDQuJFezqKdrAyFdIevADiqrWHwSlbmBNMHp5ak2f40Pm8JTFyM2mqxkG6ngkHO11f/lg==",
           "dev": true
         },
         "ansi-styles": {

package.json

@@ -30,7 +30,7 @@
     "@angular/platform-browser-dynamic": "~9.0.0",
     "@angular/router": "~9.0.0",
     "@types/d3-sankey": "^0.11.0",
-    "angular-tree-component": "^8.3.0",
+    "angular-tree-component": "^8.5.6",
     "color-convert": "^2.0.0",
     "core-js": "^2.5.4",
     "d3": "^5.9.2",