ci: remove incompatible settings for ts 3.4.1

Author: RebeccaStevens

.github/workflows/ci.yml

@@ -97,6 +97,10 @@ jobs:
         if: matrix.ts_version != 'JS'
         run: yarn add -D typescript@"${{ matrix.ts_version }}" --ignore-engines
 
+      - name: Remove incompatible settings for ts 3.4.1
+        if: matrix.ts_version == '3.4.1'
+        run: node -e 'const fs = require("fs"); const tsconfig = require("./tsconfig.base.json"); delete tsconfig.compilerOptions.exactOptionalPropertyTypes; fs.writeFileSync("./tsconfig.base.json", JSON.stringify(tsconfig));'
+
       - name: Run Tests
         run: yarn test
         env: