[1.13.x] Update Installer to 2.1.+ (#8288)

* Update Installer to 2.1.+

Signed-off-by: SizableShrimp <sizableshrimp@sizableshrimp.me>

* Update references of files.mcf.net/maven to maven.mcf.net

Signed-off-by: SizableShrimp <sizableshrimp@sizableshrimp.me>

build.gradle

@@ -1,8 +1,7 @@
 buildscript {
     repositories {
         mavenLocal()
-        maven { url = 'https://files.minecraftforge.net/maven' }
-        jcenter()
+        maven { url = 'https://maven.minecraftforge.net/' }
         mavenCentral()
     }
     dependencies {
@@ -733,7 +732,7 @@ project(':forge') {
     }
     
     task downloadInstaller(type: DownloadMavenArtifact) {
-        artifact = 'net.minecraftforge:installer:2.0.+:shrunk'
+        artifact = 'net.minecraftforge:installer:2.1.+:shrunk'
         changing = true
     }
     
@@ -1011,7 +1010,7 @@ def getArtifacts(project, config, classifiers) {
         def path = "${folder}${filename}"
         def url = "https://libraries.minecraft.net/${path}"
         if (!checkExists(url)) {
-            url = "https://files.minecraftforge.net/maven/${path}"
+            url = "https://maven.minecraftforge.net/${path}"
         }
         //TODO remove when Mojang launcher is updated
         if (!classifiers && art.classifier != null) { //Mojang launcher doesn't currently support classifiers, so... move it to part of the version, and force the extension to 'jar'

mdk/build.gradle

@@ -1,7 +1,6 @@
 buildscript {
     repositories {
-        maven { url = 'https://files.minecraftforge.net/maven' }
-        jcenter()
+        maven { url = 'https://maven.minecraftforge.net/' }
         mavenCentral()
     }
     dependencies {

src/main/resources/META-INF/mods.toml

@@ -7,7 +7,7 @@ logoFile="forge_logo.png"
     modId="forge"
     # We use the global forge version
     version="${global.forgeVersion}"
-    updateJSONURL="https://files.minecraftforge.net/maven/net/minecraftforge/forge/promotions_slim.json"
+    updateJSONURL="https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json"
     displayName="Forge"
     credits="LexManos,cpw,Mezz,fry,tterrag,gigaherz,illy"
     authors="LexManos,cpw,Mezz,fry,Spacetoad,Eloraam"