Specify all presentation sequences (#114)

Author: MDLC01

.github/workflows/ci.yml

@@ -8,4 +8,4 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
       - run: cargo build
-      - run: cargo test
+      - run: cargo test --features=_test-unicode-conformance

Cargo.lock

@@ -13,3 +13,7 @@ keywords = ["unicode", "symbols"]
 [features]
 default = ["styling"]
 styling = []
+_test-unicode-conformance = ["ureq"]
+
+[build-dependencies]
+ureq = { version = "3.0.12", optional = true }