Merge 'Change bindings/java to support java 8' from Kim Seon Woo

## Purpose of this PR
Change java bindings support from jdk version 17 to 8.
## Changes
- Mostly related to dependency version updates
- Replace java 8 non supported methods
## Reference
https://github.com/tursodatabase/limbo/issues/615

Closes #678

.github/workflows/java.yml

@@ -32,7 +32,7 @@ jobs:
         uses: actions/setup-java@v3
         with:
           distribution: 'temurin'
-          java-version: '17'
+          java-version: '8'
 
       - name: Run Java tests
         run: make test

bindings/java/build.gradle.kts

@@ -4,15 +4,15 @@ import net.ltgt.gradle.errorprone.errorprone
 plugins {
     java
     application
-    id("net.ltgt.errorprone") version "4.1.0"
+    id("net.ltgt.errorprone") version "3.1.0"
 }
 
 group = "org.github.tursodatabase"
 version = "0.0.1-SNAPSHOT"
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_17
-    targetCompatibility = JavaVersion.VERSION_17
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
 }
 
 repositories {
@@ -20,8 +20,8 @@ repositories {
 }
 
 dependencies {
-    errorprone("com.uber.nullaway:nullaway:0.12.3")
-    errorprone("com.google.errorprone:error_prone_core:2.36.0")
+    errorprone("com.uber.nullaway:nullaway:0.10.26") // maximum version which supports java 8
+    errorprone("com.google.errorprone:error_prone_core:2.10.0") // maximum version which supports java 8
 
     testImplementation(platform("org.junit:junit-bom:5.10.0"))
     testImplementation("org.junit.jupiter:junit-jupiter")

bindings/java/src/main/java/org/github/tursodatabase/LimboConnection.java

@@ -46,7 +46,7 @@ public abstract class LimboConnection implements Connection {
     }
 
     private static AbstractDB open(String url, String fileName, Properties properties) throws SQLException {
-        if (fileName.isBlank()) {
+        if (fileName.isEmpty()) {
             throw new IllegalArgumentException("fileName should not be empty");
         }
 

bindings/java/src/main/java/org/github/tursodatabase/jdbc4/JDBC4Connection.java

@@ -4,6 +4,7 @@ import org.github.tursodatabase.LimboConnection;
 import org.github.tursodatabase.annotations.SkipNullableCheck;
 
 import java.sql.*;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.Executor;
@@ -150,7 +151,7 @@ public class JDBC4Connection extends LimboConnection {
     @Override
     public Map<String, Class<?>> getTypeMap() throws SQLException {
         // TODO
-        return Map.of();
+        return new HashMap<>();
     }
 
     @Override