Avoid the sequence </style in CSS output (#1509)

The CSS code generator now avoids generating the character sequence </style in case you want to embed the CSS output in a <style>...</style> tag inside HTML:

This mirrors how the JS code generator similarly avoids the character sequence </script.

In addition, the check that escapes </style and </script is now case-insensitive to match how the browser's HTML parser behaves. So </STYLE and </SCRIPT are now escaped as well.

Fix a TypeScript parsing edge case with ASI (Automatic Semicolon Insertion) (#1512)

This fixes a parsing bug where TypeScript types consisting of multiple identifiers joined together with a . could incorrectly extend onto the next line if the next line started with <. This problem was due to ASI; esbuild should be automatically inserting a semicolon at the end of the line:

Previously the above code was incorrectly considered a syntax error since esbuild attempted to parse the parameterized type c.d<E extends F ? ...>. With this release, this code is now parsed correctly.