revert breaking changes

Author: l-trotta

specification/_global/search/_types/highlighting.ts

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { Dictionary, SingleKeyDictionary } from '@spec_utils/Dictionary'
+import { Dictionary } from '@spec_utils/Dictionary'
 import { UserDefinedValue } from '@spec_utils/UserDefinedValue'
 import { Field, Fields } from '@_types/common'
 import { integer } from '@_types/Numeric'
@@ -151,9 +151,7 @@ export class HighlightBase {
 
 export class Highlight extends HighlightBase {
   encoder?: HighlighterEncoder
-  fields:
-    | SingleKeyDictionary<Field, HighlightField>
-    | SingleKeyDictionary<Field, HighlightField>[]
+  fields: Dictionary<Field, HighlightField>
 }
 
 export enum HighlighterEncoder {

specification/_types/query_dsl/WeightedTokensQuery.ts

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import { SingleKeyDictionary } from '@spec_utils/Dictionary'
+import { Dictionary } from '@spec_utils/Dictionary'
 import { float } from '@_types/Numeric'
 import { QueryBase } from './abstractions'
 import { TokenPruningConfig } from './TokenPruningConfig'
@@ -27,7 +27,7 @@ import { TokenPruningConfig } from './TokenPruningConfig'
  */
 export class WeightedTokensQuery extends QueryBase {
   /** The tokens representing this query */
-  tokens: SingleKeyDictionary<string, float>[]
+  tokens: Dictionary<string, float>
   /** Token pruning configurations */
   pruning_config?: TokenPruningConfig
 }