Fix invalid package names

Refs: rust-lang/cargo#7959

Author: taiki-e

examples/01_02_why_async/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "01_02_why_async"
+name = "example_01_02_why_async"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/01_04_async_await_primer/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "01_04_async_await_primer"
+name = "example_01_04_async_await_primer"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/01_05_http_server/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "01_05_http_server"
+name = "example_01_05_http_server"
 version = "0.2.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/02_02_future_trait/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "02_02_future_trait"
+name = "example_02_02_future_trait"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/02_03_timer/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "02_03_timer"
+name = "example_02_03_timer"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/02_04_executor/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "02_04_executor"
+name = "example_02_04_executor"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"
@@ -8,4 +8,4 @@ edition = "2018"
 
 [dependencies]
 futures = "0.3"
-timer_future = { package = "02_03_timer", path = "../02_03_timer" }
+timer_future = { package = "example_02_03_timer", path = "../02_03_timer" }

examples/03_01_async_await/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "03_01_async_await"
+name = "example_03_01_async_await"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/05_01_streams/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "05_01_streams"
+name = "example_05_01_streams"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/05_02_iteration_and_concurrency/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "05_02_iteration_and_concurrency"
+name = "example_05_02_iteration_and_concurrency"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"

examples/06_02_join/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "06_02_join"
+name = "example_06_02_join"
 version = "0.1.0"
 authors = ["Taylor Cramer <[email protected]>"]
 edition = "2018"