Update JaCoCo tool version to 0.8.13 and improve build.gradle configuration

- Updated JaCoCo tool version for enhanced test coverage reporting.
- Fixed syntax for Maven repository URL.
- Added exclusions in test configuration to avoid instrumenting JDK internals.
- Updated HashMap instantiation in SerpApi.java for type safety.

Author: jvmvik

build.gradle

@@ -6,7 +6,7 @@ plugins {
 }
 
 jacoco {
-    toolVersion = "0.8.12"
+    toolVersion = "0.8.13"
 }
 
 jacocoTestReport {
@@ -33,7 +33,7 @@ java {
 repositories {
     mavenCentral()
 
-    maven { url "https://jitpack.io" }
+    maven { url = "https://jitpack.io" }
 }
 
 dependencies {
@@ -57,11 +57,16 @@ tasks.named('jar') {
 }
 
 test {
+    jacoco {
+        // Avoid trying to instrument JDK internals on newest runtimes.
+        excludes = ['java.*', 'jdk.*', 'sun.*']
+    }
+
     testLogging {
         events "passed", "skipped", "failed"
-        exceptionFormat "short"
-        showStackTraces true
-        showStandardStreams true
+        exceptionFormat = "short"
+        showStackTraces = true
+        showStandardStreams = true
     }
 }
 

src/main/java/serpapi/SerpApi.java

@@ -46,7 +46,7 @@ public SerpApi(Map<String, String> parameter) {
    * Constructor without arguments
    */
   public SerpApi() {
-    this.parameter = new HashMap();
+    this.parameter = new HashMap<>();
     this.client = new SerpApiHttp("/search");
     this.client.setHttpConnectionTimeout(this.timeout);
   }
@@ -153,7 +153,7 @@ public String get(String path, String output, Map<String, String> parameter) thr
     this.client.path = path;
 
     // create HTTP query
-    Map<String, String> query = new HashMap();
+    Map<String, String> query = new HashMap<>();
 
     if (path.startsWith("/searches")) {
       // Only preserve API_KEY