Add resolver = "2" to all examples (#192)

- These are ignored, but it should prevent copy-pasta errors from users

examples/conway/Cargo.toml

@@ -3,6 +3,7 @@ name = "conway"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/custom-shader/Cargo.toml

@@ -3,6 +3,7 @@ name = "custom-shader"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/egui-winit/Cargo.toml

@@ -3,6 +3,7 @@ name = "egui-winit"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/imgui-winit/Cargo.toml

@@ -3,6 +3,7 @@ name = "imgui-winit"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/invaders/Cargo.toml

@@ -3,6 +3,7 @@ name = "invaders"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/minimal-fltk/Cargo.toml

@@ -3,6 +3,7 @@ name = "minimal-fltk"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/minimal-sdl2/Cargo.toml

@@ -3,6 +3,7 @@ name = "minimal-sdl2"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/minimal-winit/Cargo.toml

@@ -3,6 +3,7 @@ name = "minimal-winit"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]

examples/raqote-winit/Cargo.toml

@@ -3,6 +3,7 @@ name = "raqote-winit"
 version = "0.1.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
 edition = "2018"
+resolver = "2"
 publish = false
 
 [features]