Add regex feature for gossipsub

[tzemanovic]

closes #2055

[AgeManning]

It might make more sense to just remove the condition compilation inside gossipsub such that any libp2p implementation that compiles with gossipsub also gets regex by default.

This saves the crate-level feature flag that also enables gossipsub and regex.

What do you think?

[mxinden]

What do you think?

Though this question is likely not addressed to me, I am in favor of @AgeManning's suggestion. @tzemanovic do you want to update the pull request?

[tzemanovic]

sounds good, will do!

[mxinden]

@tzemanovic can you apply the diff below? I can then cut a patch release of libp2p-gossipsub later today.

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 62705acc..629bc522 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,6 +45,7 @@
 
 - Update individual crates.
     - `libp2p-core`
+    - `libp2p-gossipsub`
 
 ## Version 0.37.1 [2021-04-14]
 
diff --git a/Cargo.toml b/Cargo.toml
index acb1ab8d..1b1a5ceb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -66,7 +66,7 @@ futures = "0.3.1"
 lazy_static = "1.2"
 libp2p-core = { version = "0.28.3", path = "core",  default-features = false }
 libp2p-floodsub = { version = "0.29.0", path = "protocols/floodsub", optional = true }
-libp2p-gossipsub = { version = "0.30.0", path = "./protocols/gossipsub", optional = true }
+libp2p-gossipsub = { version = "0.30.1", path = "./protocols/gossipsub", optional = true }
 libp2p-identify = { version = "0.29.0", path = "protocols/identify", optional = true }
 libp2p-kad = { version = "0.30.0", path = "protocols/kad", optional = true }
 libp2p-mplex = { version = "0.28.0", path = "muxers/mplex", optional = true }
diff --git a/protocols/gossipsub/CHANGELOG.md b/protocols/gossipsub/CHANGELOG.md
index 9d916961..7bc1f9aa 100644
--- a/protocols/gossipsub/CHANGELOG.md
+++ b/protocols/gossipsub/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 0.30.1 [2021-04-27]
+
+- Remove `regex-filter` feature flag thus always enabling `regex::RegexSubscriptionFilter` [PR
+  2056](https://github.com/libp2p/rust-libp2p/pull/2056).
+
 # 0.30.0 [2021-04-13]
 
 - Update `libp2p-swarm`.
diff --git a/protocols/gossipsub/Cargo.toml b/protocols/gossipsub/Cargo.toml
index eaa21894..a0ecc7e3 100644
--- a/protocols/gossipsub/Cargo.toml
+++ b/protocols/gossipsub/Cargo.toml
@@ -2,7 +2,7 @@
 name = "libp2p-gossipsub"
 edition = "2018"
 description = "Gossipsub protocol for libp2p"
-version = "0.30.0"
+version = "0.30.1"
 authors = ["Age Manning <Age@AgeManning.com>"]
 license = "MIT"
 repository = "https://github.com/libp2p/rust-libp2p"

[tzemanovic]

@mxinden done, thanks!

[mxinden]

Thanks @tzemanovic.

libp2p-gossipsub v0.30.1 tagged and published.