fix pragma

libs/remix-tests/tests/examples_1/simple_storage.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 contract SimpleStorage {
   uint public storedData;
 

libs/remix-tests/tests/examples_1/simple_storage_test.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 import "./simple_storage.sol";
 
 contract MyTest {

libs/remix-tests/tests/examples_2/simple_storage.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 contract SimpleStorage {
   uint public storedData;
 

libs/remix-tests/tests/examples_2/simple_storage_test.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 import "./simple_storage.sol";
 
 contract MyTest {

libs/remix-tests/tests/examples_3/simple_string.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 contract SimpleString {
   string public storedData;
 

libs/remix-tests/tests/examples_3/simple_string_test.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 import "./simple_string.sol";
 
 contract StringTest {

libs/remix-tests/tests/examples_5/contract/simple_storage.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 
 import "../../examples_4/SafeMath.sol";
 import "../lib/EvenOdd.sol";

libs/remix-tests/tests/examples_5/lib/EvenOdd.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 
 contract EvenOdd {
     

libs/remix-tests/tests/examples_5/test/simple_storage_test.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 import "./../contract/simple_storage.sol";
 
 contract StorageResolveTest {

libs/remix-tests/tests/number/number_test.sol

@@ -1,4 +1,4 @@
-pragma solidity >= 0.5.0 < 0.8.0;
+pragma solidity >= 0.5.0 < 0.9.0;
 
 contract IntegerTest {