[unity] Added package.json files to support using the spine-unity core runtime and the examples as UPM packages. This could be used to e.g. reduce compile time. See #1276.

spine-unity/Assets/Spine Examples/package.json

@@ -0,0 +1,20 @@
+{
+	"name": "com.esotericsoftware.spine.spine-unity-examples",
+	"displayName": "spine-unity Runtime Examples",
+	"description": "This plugin provides example scenes and scripts for the spine-unity runtime.",
+	"version": "3.8.0",
+	"unity": "2018.3",
+	"author": {
+		"name": "Esoteric Software",
+		"email": "[email protected]",
+		"url": "http://esotericsoftware.com/"
+	},
+	"dependencies": {
+		"com.esotericsoftware.spine.spine-unity": "3.8.0"
+	},
+	"keywords": [
+		"spine",
+		"spine-unity",
+		"core"
+	]
+}

spine-unity/Assets/Spine Examples/package.json.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 3344f01d63135c94e81d853f56d6c4e5
+PackageManifestImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

spine-unity/Assets/Spine Examples/spine-unity-examples.asmdef

@@ -0,0 +1,4 @@
+{
+	"name": "spine-unity-examples",
+	"references": [ "spine-unity" ]
+}

spine-unity/Assets/Spine Examples/spine-unity-examples.asmdef.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 8f5163e4753269348a069fd2fedcba29
+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

spine-unity/Assets/Spine/package.json

@@ -0,0 +1,19 @@
+{
+	"name": "com.esotericsoftware.spine.spine-unity",
+	"displayName": "spine-unity Runtime",
+	"description": "This plugin provides the spine-unity runtime core.",
+	"version": "3.8.0",
+	"unity": "2018.3",
+	"author": {
+		"name": "Esoteric Software",
+		"email": "[email protected]",
+		"url": "http://esotericsoftware.com/"
+	},
+	"dependencies": {
+	},
+	"keywords": [
+		"spine",
+		"spine-unity",
+		"core"
+	]
+}

spine-unity/Assets/Spine/package.json.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 09478c42aa0375347898d942d287a819
+PackageManifestImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: