Bump edition and add rust-version field to Cargo.toml

Author: dhardy

Cargo.toml

@@ -13,7 +13,8 @@ Random number generators and other randomness functionality.
 keywords = ["random", "rng"]
 categories = ["algorithms", "no-std"]
 autobenches = true
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 include = ["src/", "LICENSE-*", "README.md", "CHANGELOG.md", "COPYRIGHT"]
 
 [package.metadata.docs.rs]

rand_chacha/Cargo.toml

@@ -12,7 +12,8 @@ ChaCha random number generator
 """
 keywords = ["random", "rng", "chacha"]
 categories = ["algorithms", "no-std"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 
 [dependencies]
 rand_core = { path = "../rand_core", version = "0.6.0" }

rand_core/Cargo.toml

@@ -12,7 +12,8 @@ Core random number generator traits and tools for implementation.
 """
 keywords = ["random", "rng"]
 categories = ["algorithms", "no-std"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 
 [package.metadata.docs.rs]
 # To build locally:

rand_distr/Cargo.toml

@@ -12,7 +12,8 @@ Sampling from random number distributions
 """
 keywords = ["random", "rng", "distribution", "probability"]
 categories = ["algorithms", "no-std"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 include = ["src/", "LICENSE-*", "README.md", "CHANGELOG.md", "COPYRIGHT"]
 
 [features]

rand_distr/benches/Cargo.toml

@@ -4,7 +4,8 @@ version = "0.0.0"
 authors = ["The Rand Project Developers"]
 license = "MIT OR Apache-2.0"
 description = "Criterion benchmarks of the rand_distr crate"
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 publish = false
 
 [workspace]
@@ -19,4 +20,4 @@ rand_pcg = { path = "../../rand_pcg/" }
 [[bench]]
 name = "distributions"
 path = "src/distributions.rs"
-harness = false
+harness = false

rand_pcg/Cargo.toml

@@ -12,7 +12,8 @@ Selected PCG random number generators
 """
 keywords = ["random", "rng", "pcg"]
 categories = ["algorithms", "no-std"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 
 [features]
 serde1 = ["serde"]

rustfmt.toml

@@ -19,7 +19,7 @@ where_single_line = true
 # struct_field_align_threshold = 20
 
 # Compatibility:
-edition = "2018"        # we require compatibility back to 1.32.0
+edition = "2021"
 
 # Misc:
 inline_attribute_width = 80