Enable dataframe test

Author: ileasile

libraries/dataframe.json

@@ -1,7 +1,7 @@
 {
   "description": "Kotlin framework for structured data processing",
   "properties": {
-    "v": "0.7.1-dev-104"
+    "v": "0.7.1-dev-106"
   },
   "repositories": [
     "https://kotlin.bintray.com/kotlin-datascience"

src/test/kotlin/org/jetbrains/kotlinx/jupyter/test/repl/ReplWithResolverTests.kt

@@ -21,7 +21,6 @@ import org.jetbrains.kotlinx.jupyter.test.classpath
 import org.jetbrains.kotlinx.jupyter.test.standardResolverRuntimeProperties
 import org.jetbrains.kotlinx.jupyter.test.testResolverConfig
 import org.junit.jupiter.api.Assertions
-import org.junit.jupiter.api.Disabled
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.parallel.Execution
 import org.junit.jupiter.api.parallel.ExecutionMode
@@ -62,7 +61,6 @@ class ReplWithResolverTests : AbstractReplTest() {
     }
 
     @Test
-    @Disabled // TODO: restore
     fun testDataframe() {
         val res = repl.eval(
             """