Update test lib

Author: koji-1009

build.gradle

@@ -12,7 +12,9 @@ buildscript {
             'annotation'      : '1.1.0',
             'core_ktx'        : '1.2.0',
             'appcompat'       : '1.1.0',
-            'constraintLayout': '1.1.3'
+            'constraintLayout': '1.1.3',
+            'junit'           : '4.13',
+            'robolectric'     : '4.3.1'
     ]
     repositories {
         google()

sdk-example-java/build.gradle

@@ -34,12 +34,12 @@ repositories {
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
 
-    implementation "androidx.appcompat:appcompat:${versions.appcompat}"
-    implementation "androidx.constraintlayout:constraintlayout:${versions.constraintLayout}"
+    implementation "androidx.appcompat:appcompat:$versions.appcompat"
+    implementation "androidx.constraintlayout:constraintlayout:$versions.constraintLayout"
 
     implementation 'com.github.studyplus:Studyplus-Android-SDK:2.5.1'
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$versions.junit"
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }

sdk-example-kt/build.gradle

@@ -33,12 +33,12 @@ repositories {
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    implementation "androidx.appcompat:appcompat:${versions.appcompat}"
-    implementation "androidx.constraintlayout:constraintlayout:${versions.constraintLayout}"
+    implementation "androidx.appcompat:appcompat:$versions.appcompat"
+    implementation "androidx.constraintlayout:constraintlayout:$versions.constraintLayout"
 
     implementation 'com.github.studyplus:Studyplus-Android-SDK:2.5.1'
 
-    testImplementation 'junit:junit:4.12'
+    testImplementation "junit:junit:$versions.junit"
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
 }

studyplus-android-sdk/build.gradle

@@ -50,8 +50,8 @@ dependencies {
     def okhttp = "4.4.1"
     implementation "com.squareup.okhttp3:okhttp:$okhttp"
 
-    testImplementation 'junit:junit:4.12'
-    testImplementation 'org.robolectric:robolectric:4.0.2'
+    testImplementation "junit:junit:$versions.junit"
+    testImplementation "org.robolectric:robolectric:$versions.robolectric"
     testImplementation "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
     testImplementation "com.squareup.okhttp3:mockwebserver:$okhttp"
 }