chore: Update build toolchain (#23)

This pull requests updates the project as follows:
1. **Update Gradle version to 4.8**
   This allows us to make use of new features such as native JUnit 5 integration and the build cache.
2. **Update Gradle build configuration according to new changes**
   This change allows us to share configuration across modules and easily change the versions for shared dependencies. In addition, we now make use of the `java-library` plugin which allows for various optimizations. See https://docs.gradle.org/current/userguide/java_library_plugin.html
3. **Add support for Jacoco**
    We add support code coverage tracking via the latest version of Jacoco which has increasing support for Kotlin.

Closes #22 

1 files changed, 45 insertions, 0 deletions

diff --git a/build.gradle b/build.gradle
new file mode 100644
index 00000000..8ce1956a
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,45 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2017 atlarge-research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+plugins {
+    id 'org.jetbrains.kotlin.jvm' version '1.2.51' apply false
+    id 'org.jetbrains.kotlin.plugin.jpa' version '1.2.51' apply false
+    id 'org.jetbrains.dokka' version '0.9.17' apply false
+}
+
+allprojects {
+    group = 'com.atlarge.opendc'
+    version = '1.2'
+
+    ext {
+        kotlinx_coroutines_version = '0.23.4'
+        junit_jupiter_version = '5.2.0'
+        junit_platform_version = '1.2.0'
+        jacoco_version = '0.8.2-SNAPSHOT'
+    }
+}
+
+wrapper {
+    gradleVersion = '4.8'
+}