Add FeedIcon API call and update dependencies

vendor/golang.org/x/text/cases/gen.go

@@ -207,7 +207,7 @@ func genTables() {
 	}
 
 	w := gen.NewCodeWriter()
-	defer w.WriteGoFile("tables.go", "cases")
+	defer w.WriteVersionedGoFile("tables.go", "cases")
 
 	gen.WriteUnicodeVersion(w)
 
@@ -761,7 +761,7 @@ func genTablesTest() {
 
 	fmt.Fprintln(w, ")")
 
-	gen.WriteGoFile("tables_test.go", "cases", w.Bytes())
+	gen.WriteVersionedGoFile("tables_test.go", "cases", w.Bytes())
 }
 
 // These functions are just used for verification that their definition have not

vendor/golang.org/x/text/cases/tables10.0.0.go

@@ -1,5 +1,7 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
+// +build go1.10
+
 package cases
 
 // UnicodeVersion is the Unicode version from which the tables in this package are derived.

vendor/golang.org/x/text/cases/tables10.0.0_test.go

@@ -1,5 +1,7 @@
 // Code generated by running "go generate" in golang.org/x/text. DO NOT EDIT.
 
+// +build go1.10
+
 package cases
 
 var (