Adds some more version pragma test cases.

test/libsolidity/syntaxTests/pragma/broken_version_6.sol

@@ -0,0 +1,3 @@
+pragma solidity v1.2.3;
+// ----
+// ParserError 1684: (0-23): Found version pragma, but failed to parse it. Please ensure there is a trailing semicolon.

test/libsolidity/syntaxTests/pragma/broken_version_7.sol

@@ -0,0 +1,3 @@
+pragma solidity >0.5.0<;
+// ----
+// ParserError 1684: (0-24): Found version pragma, but failed to parse it. Please ensure there is a trailing semicolon.

test/libsolidity/syntaxTests/pragma/version_range.sol

@@ -0,0 +1,2 @@
+pragma solidity >=0.4.0 <0.9.0;
+// ----