Add improved build with artifact upload

Author: mikera

.github/workflows/tests.yml renamed to .github/workflows/build.yml

@@ -30,5 +30,11 @@ jobs:
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           path: ~/.m2
           restore-keys: ${{ runner.os }}-m2
-      - name: Run tests
-        run: mvn clean test
+      - name: Install and run tests
+        run: mvn clean install
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: convex-jar
+          path: convex-integration/target/convex.jar # Path to the built .jar
+          retention-days: 7 # Optional: Set retention period

convex-core/src/test/java/convex/core/util/EconomicsTest.java

@@ -41,7 +41,7 @@ public void testPoolPrice() {
 		// selling into pool at zero price
 		checkSwap(0, -1, 1, 1);
 
-		// Overflow casess
+		// Overflow cases
 		assertEquals(Long.MAX_VALUE, Economics.swapPrice(Long.MAX_VALUE-1, Long.MAX_VALUE, 10));
 		assertEquals(Long.MAX_VALUE, Economics.swapPrice(1, 10, Long.MAX_VALUE));