Packaging Update

# Added
- Added LICENCE.
- Added build workflow.
- Added release workflow.
- Added PackageTools.

# Changed
- Update Unity from 2020.3.1f1 to 2020.8.1f1.

Packages/manifest.json

@@ -2,11 +2,11 @@
   "dependencies": {
     "com.unity.collab-proxy": "1.3.9",
     "com.unity.ide.rider": "2.0.7",
-    "com.unity.ide.visualstudio": "2.0.7",
+    "com.unity.ide.visualstudio": "2.0.8",
     "com.unity.ide.vscode": "1.2.3",
-    "com.unity.test-framework": "1.1.22",
+    "com.unity.test-framework": "1.1.24",
     "com.unity.textmeshpro": "3.0.1",
-    "com.unity.timeline": "1.4.6",
+    "com.unity.timeline": "1.4.7",
     "com.unity.ugui": "1.0.0",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",

Packages/packages-lock.json

@@ -24,7 +24,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.ide.visualstudio": {
-      "version": "2.0.7",
+      "version": "2.0.8",
       "depth": 0,
       "source": "registry",
       "dependencies": {
@@ -40,7 +40,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.test-framework": {
-      "version": "1.1.22",
+      "version": "1.1.24",
       "depth": 0,
       "source": "registry",
       "dependencies": {
@@ -60,7 +60,7 @@
       "url": "https://packages.unity.com"
     },
     "com.unity.timeline": {
-      "version": "1.4.6",
+      "version": "1.4.7",
       "depth": 0,
       "source": "registry",
       "dependencies": {