Add tests for alpha BT values

- Update deps
- Update release notes for v3.1

src/Tests/PostgresTests.fs

@@ -488,13 +488,20 @@ let integrationTests =
                 let! theCount = Count.all PostgresDb.TableName
                 Expect.equal theCount 5 "There should have been 5 matching documents"
             }
-            testTask "byField succeeds" {
+            testTask "byField succeeds for numeric range" {
                 use db = PostgresDb.BuildDb()
                 do! loadDocs ()
                 
                 let! theCount = Count.byField PostgresDb.TableName (Field.BT "NumValue" 10 20)
                 Expect.equal theCount 3 "There should have been 3 matching documents"
             }
+            testTask "byField succeeds for non-numeric range" {
+                use db = PostgresDb.BuildDb()
+                do! loadDocs ()
+                
+                let! theCount = Count.byField PostgresDb.TableName (Field.BT "Value" "aardvark" "apple")
+                Expect.equal theCount 1 "There should have been 1 matching document"
+            }
             testTask "byContains succeeds" {
                 use db = PostgresDb.BuildDb()
                 do! loadDocs ()