Fix package versions and add missing meta files

src/com.unity.git.api/Api/version.json.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 2a697329fe73bee4cb65819a5c378560
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/com.unity.git.api/package.json

@@ -1,7 +1,7 @@
 {
 	"name": "com.unity.git.api",
 	"displayName": "Git for Unity Core",
-	"version": "2.0.0.0-dev",
+	"version": "2.0.0-dev",
 	"unity": "2018.4",
 	"description": "Git for Unity brings [Git](https://git-scm.com/) into [Unity](https://unity3d.com/), integrating source control into your work with friendly and accessible tools and workflows.",
 	"dependencies": {

src/com.unity.git.ui/eula.txt.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 7fba0bec08f4302489acf30349bdb9cb
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/com.unity.git.ui/package.json

@@ -1,7 +1,7 @@
 {
 	"name": "com.unity.git.ui",
 	"displayName": "Git for Unity UI",
-	"version": "2.0.0.0-dev",
+	"version": "2.0.0-dev",
 	"unity": "2018.4",
 	"description": "Git for Unity brings [Git](https://git-scm.com/) into [Unity](https://unity3d.com/), integrating source control into your work with friendly and accessible tools and workflows.",
 	"dependencies": {

src/com.unity.git.ui/version.json.meta

@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: 8ccdbb0966a0ba144948538649e26d1b
+TextScriptImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: