fix(QueryBool): minimum_should_match should be string type

Author: nodkz

src/ElasticDSL/Query/Compound/Bool.js

@@ -47,10 +47,9 @@ export function getBoolITC(opts: mixed = {}): InputTypeComposer {
           `),
         },
         minimum_should_match: {
-          type: 'Int',
+          type: 'String',
           description: desc(`
-            The minimum number of should clauses to match can be set using
-            the minimum_should_match parameter.
+            The minimum number of should clauses to match.
           `),
         },
         must_not: {

src/ElasticDSL/Query/__snapshots__/Query.test.js.snap

@@ -111,8 +111,8 @@ input Elastic_QueryBool_50 {
   # minimum_should_match parameter. 
   should: Elastic_Query_50
 
-  # The minimum number of should clauses to match can be set using the minimum_should_match parameter. 
-  minimum_should_match: Int
+  # The minimum number of should clauses to match. 
+  minimum_should_match: String
 
   # The clause (query) must not appear in the matching documents. Clauses are
   # executed in filter context meaning that scoring is ignored and clauses are