[movies] update: Update coroutines to latest 1.4.0 version

A notable addition to this release is the below:

"StateFlow, SharedFlow and corresponding operators are promoted to
stable API (Kotlin/kotlinx.coroutines#2316)."

buildSrc/src/main/kotlin/io/petros/movies/config/deps/Versions.kt

@@ -17,7 +17,7 @@ object Versions {
     object Kotlin {
 
         // Releases: https://github.com/Kotlin/kotlinx.coroutines/releases
-        const val COROUTINES = "1.3.9" // Released: 14-08-20
+        const val COROUTINES = "1.4.0" // Released: 26-10-20
 
     }