feat(sliding-sync): enable gzip when enabling sliding-sync

Cargo.lock

@@ -232,6 +232,19 @@ dependencies = [
  "futures-core",
 ]
 
+[[package]]
+name = "async-compression"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "942c7cd7ae39e91bde4820d74132e9862e62c2f386c3aa90ccf55949f5bad63a"
+dependencies = [
+ "flate2",
+ "futures-core",
+ "memchr",
+ "pin-project-lite",
+ "tokio",
+]
+
 [[package]]
 name = "async-lock"
 version = "2.6.0"
@@ -3888,6 +3901,7 @@ version = "0.11.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68cc60575865c7831548863cc02356512e3f1dc2f3f82cb837d7fc4cc8f3c97c"
 dependencies = [
+ "async-compression",
  "base64 0.13.1",
  "bytes",
  "encoding_rs",
@@ -3916,6 +3930,7 @@ dependencies = [
  "tokio-native-tls",
  "tokio-rustls",
  "tokio-socks",
+ "tokio-util",
  "tower-service",
  "url",
  "wasm-bindgen",

crates/matrix-sdk/Cargo.toml

@@ -47,6 +47,7 @@ experimental-timeline = ["ruma/unstable-msc2677", "dep:chrono"]
 experimental-sliding-sync = [
     "matrix-sdk-base/experimental-sliding-sync",
     "experimental-timeline",
+    "reqwest/gzip",
     "dep:derive_builder",
 ]