Swift 1.0 only supports 3.6+ (#704)

* change minimum mongodb version to 3.6

* remove 3.4 from table

Co-authored-by: Nathan Leniz <[email protected]>

Author: terakilobyte

source/includes/mongodb-compatibility-table-swift.rst

@@ -8,16 +8,14 @@
      - MongoDB 4.2
      - MongoDB 4.0
      - MongoDB 3.6
-     - MongoDB 3.4
 
    * - 1.0.0
      - |checkmark| (*)
      - |checkmark|
      - |checkmark|
      - |checkmark|
-     - |checkmark|
 
-The Swift driver is not compatible with MongoDB server versions older than 3.4.
+The Swift driver is not compatible with MongoDB server versions older than 3.6.
 
 (*) Not all features in MongoDB 4.4 are available in this version of the
 driver including OCSP and MONGODB-AWS. These features will be included in