Updated plugin / gradle to latest (#153)

* Updated plugin/gradle to latest

Can now perform build scans with `--scan` argument.

* Fix circular dependency in test

build.gradle.kts

@@ -1,13 +1,3 @@
-buildscript {
-    repositories {
-        gradlePluginPortal()
-        maven {
-            url = uri("https://plugins.gradle.org/m2/")
-        }
-    }
-    dependencies {
-        classpath("ca.islandora:isle-gradle-docker-plugin:0.0.5")
-    }
-}
-
-apply(plugin = "IsleDocker")
+plugins {
+  id("com.github.nigelgbanks.IsleDocker") version "0.7"
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

settings.gradle.kts

@@ -1,12 +1,5 @@
 rootProject.name = "isle-buildkit"
 
-// Include plugin for building Docker images.
-sourceControl {
-    gitRepository(uri("https://github.com/Islandora-Devops/isle-gradle-docker-plugin.git")) {
-        producesModule("ca.islandora:isle-gradle-docker-plugin")
-    }
-}
-
 // Include any folder that has a Dockerfile as a sub-project.
 rootProject.projectDir
     .walk()