Gradle QOL improvements.

So that eclipse doesn't complain.

build.gradle

@@ -5,7 +5,7 @@ plugins {
 }
 
 repositories {
-    jcenter()
+    mavenCentral()
     maven { url 'https://jitpack.io' }
 }
 
@@ -13,7 +13,7 @@ dependencies {
     implementation 'org.apache.commons:commons-lang3:3.12.0'
     implementation 'org.apache.commons:commons-text:1.9'
     implementation 'commons-io:commons-io:2.9.0'
-    implementation 'it.unimi.dsi:fastutil:8.5.3'
+    implementation 'it.unimi.dsi:fastutil-core:8.5.4'
     implementation 'commons-codec:commons-codec:1.15'
     implementation 'org.bouncycastle:bcprov-jdk15on:1.67'
     implementation 'org.mongodb:mongodb-driver-sync:4.2.2'

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.2-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists