Match exact blocks by default, allow prefix matching with the use of a * in the block options

[levibuzolic]

Previously blocks were matched by prefix, meaning testResource.only would trigger an error when trying to match for blocks of test. In coms cases this could be too noisy, especially when using libraries that may include a .only method as any of the default configured blocks ('describe', 'it', 'context', 'test', 'tape', 'fixture', 'serial') could match.

This PR removes that behaviour by default and allows it to be optionally configured by specify blocks with a trailing asterisk (ie. test* to opt into the old behaviour).

Fixes #33

[github-actions]

📊 Package size report   6%↑

File	Before	After
README.md	3.1 kB	3%↑3.2 kB
rules/no-only-tests.js	2.4 kB	16%↑2.8 kB
Total (Includes all files)	7.4 kB	6%↑7.9 kB
Tarball size	3.3 kB	5%↑3.4 kB

Unchanged files

File	Size
index.js	106 B
LICENSE	1.1 kB
package.json	807 B

_{🤖 This report was automatically generated by pkg-size-action}