chore: revert to 2018 edition (#847)

Fixes https://github.com/hyperium/tonic/issues/843

README.md

@@ -41,7 +41,7 @@ the generated code.
 
 ### Rust Version
 
-`tonic` currently works on Rust `1.56` and above as it requires support for the 2021 edition.
+`tonic` currently works on Rust `1.56` and above as it requires support for the 2018 edition.
 
 ```bash
 $ rustup update

examples/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "examples"
 publish = false

interop/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "interop"
 publish = false

rustfmt.toml

@@ -1 +1 @@
-edition = "2021"
+edition = "2018"

tests/ambiguous_methods/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Yonathan Randolph <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "ambiguous_methods"
 publish = false

tests/compression/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "compression"
 publish = false

tests/extern_path/my_application/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Danny Hua <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "my_application"
 publish = false

tests/extern_path/uuid/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Danny Hua <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "uuid1"
 publish = false

tests/included_service/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "included_service"
 publish = false

tests/integration_tests/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "integration-tests"
 publish = false

tests/root-crate-path/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "root-crate-path"
 publish = false

tests/same_name/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "same_name"
 publish = false

tests/service_named_service/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "service_named_service"
 publish = false

tests/stream_conflict/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Ben Sully <[email protected]>"]
-edition = "2021"
+edition = "2018"
 name = "stream_conflict"
 publish = false
 version = "0.1.0"

tests/wellknown-compiled/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "wellknown-compiled"
 publish = false

tests/wellknown/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Lucio Franco <[email protected]>"]
-edition = "2021"
+edition = "2018"
 license = "MIT"
 name = "wellknown"
 publish = false

tonic-build/Cargo.toml

@@ -5,7 +5,7 @@ description = """
 Codegen module of `tonic` gRPC implementation.
 """
 documentation = "https://docs.rs/tonic-build/0.6.0/tonic_build/"
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "async", "codegen", "protobuf"]
 license = "MIT"

tonic-health/Cargo.toml

@@ -5,7 +5,7 @@ description = """
 Health Checking module of `tonic` gRPC implementation.
 """
 documentation = "https://docs.rs/tonic-health/0.4.0/tonic-health/"
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "async", "healthcheck"]
 license = "MIT"

tonic-reflection/Cargo.toml

@@ -7,7 +7,7 @@ categories = ["network-programming", "asynchronous"]
 description = """
 Server Reflection module of `tonic` gRPC implementation.
 """
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "async", "reflection"]
 license = "MIT"

tonic-types/Cargo.toml

@@ -5,7 +5,7 @@ description = """
 A collection of useful protobuf types that can be used with `tonic`.
 """
 documentation = "https://docs.rs/tonic-types/0.4.0/tonic-types/"
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "protobuf"]
 license = "MIT"

tonic-web/Cargo.toml

@@ -5,7 +5,7 @@ description = """
 grpc-web protocol translation for tonic services.
 """
 documentation = "https://docs.rs/tonic-web/0.2.0/tonic-web/"
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "grpc-web"]
 license = "MIT"

tonic-web/tests/integration/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 authors = ["Juan Alvarez <[email protected]>"]
-edition = "2021"
+edition = "2018"
 name = "integration"
 publish = false
 version = "0.1.0"

tonic/Cargo.toml

@@ -14,7 +14,7 @@ description = """
 A gRPC over HTTP/2 implementation focused on high performance, interoperability, and flexibility.
 """
 documentation = "https://docs.rs/tonic/0.6.1/tonic/"
-edition = "2021"
+edition = "2018"
 homepage = "https://github.com/hyperium/tonic"
 keywords = ["rpc", "grpc", "async", "futures", "protobuf"]
 license = "MIT"