upgrade kotlin, ktor, sendgrid

src/main/kotlin/dto/Opinionable.kt

@@ -8,4 +8,4 @@ interface Opinionable {
     class Imp(parent: fr.dcproject.entity.Opinionable) : Opinionable {
         override val opinions: Opinions = parent.opinions
     }
-}
+}

src/main/kotlin/dto/Votable.kt

@@ -6,4 +6,4 @@ interface Votable {
     class Imp(parent: fr.dcproject.entity.Votable) : Votable {
         override val votes: VoteAggregation = VoteAggregation(parent)
     }
-}
+}