update version numbers

src/ImageSharp.Drawing/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Drawing",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp.Formats.Bmp/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Formats.Bmp",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp.Formats.Gif/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Formats.Gif",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp.Formats.Jpeg/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Formats.Jpeg",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp.Formats.Png/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Formats",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp.Formats/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp.Formats",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [

src/ImageSharp/project.json

@@ -1,5 +1,5 @@
 {
-  "version": "1.0.0-*",
+  "version": "1.0.0-alpha1-*",
   "title": "ImageSharp",
   "description": "A cross-platform library for the processing of image files; written in C#",
   "authors": [