fix(tests): Tarpaulin config file

.github/workflows/main.yml

@@ -97,10 +97,7 @@ jobs:
         # and https://github.com/xd009642/tarpaulin/issues/517#issuecomment-1779964669.
         run: >
           cargo tarpaulin
-          --out xml
-          --engine llvm
-          --no-default-features
-          --features all
+          --verbose
           ${{ matrix.cli-option }}
 
       - name: Upload coverage reports to Codecov

tarpaulin.toml

@@ -0,0 +1,16 @@
+# For example files, see...
+# https://github.com/xd009642/tarpaulin/blob/cacf8d887d66b20091e168e08b1a8b9778d819f4/tarpaulin.toml#L3
+# https://github.com/matrix-org/matrix-rust-sdk/blob/82684d64d4d6ad84add1b627520aa3956cac9fc6/tarpaulin.toml#L4
+
+[default]
+engine = "Llvm"
+skip-clean = true
+no-default-features = true
+all-features = true
+exclude-files = ["build.rs"]
+
+# For README.md tests, where child processes are spawned
+follow-exec = true
+
+[report]
+out = ["Html", "Xml"]