Perf exclude coverage non transpiled output

[JackHowa]

before:

npm notice 📦  @thrash-industries/react-actioncable-provider@2.0.7
npm notice === Tarball Contents === 
npm notice 9B     .browserslistrc                           
npm notice 1.1kB  LICENSE                                   
npm notice 5.4kB  coverage/lcov-report/base.css             
npm notice 676B   coverage/lcov-report/prettify.css         
npm notice 3.8kB  coverage/lcov-report/index.html           
npm notice 30.5kB coverage/lcov-report/index.js.html        
npm notice 2.2kB  coverage/lcov.info                        
npm notice 2.4kB  coverage/lcov-report/block-navigation.js  
npm notice 6.7kB  dist/index.js                             
npm notice 5.1kB  lib/index.js                              
npm notice 3.1kB  lib/__tests__/index.test.js               
npm notice 17.6kB coverage/lcov-report/prettify.js          
npm notice 5.3kB  coverage/lcov-report/sorter.js            
npm notice 14.4kB coverage/coverage-final.json              
npm notice 1.6kB  package.json                              
npm notice 3.4kB  README.md                                 
npm notice 209B   coverage/lcov-report/sort-arrow-sprite.png
npm notice 4.1kB  coverage/clover.xml                       
npm notice === Tarball Details === 
npm notice name:          @thrash-industries/react-actioncable-provider
npm notice version:       2.0.7                                        
npm notice package size:  24.6 kB                                      
npm notice unpacked size: 107.4 kB                                     
npm notice shasum:        35617a05fde87b57d147c3a2a5e249e57258a381     
npm notice integrity:     sha512-5+O6mNTW8eYy+[...]YpeZ1y+BNfXMA==     
npm notice total files:   18                                           
npm notice 

after:

jackhowa@Jacks-Mac-mini react-actioncable-provider % npm publish --dry-run
npm notice 
npm notice 📦  @thrash-industries/react-actioncable-provider@3.0.0
npm notice === Tarball Contents === 
npm notice 1.1kB LICENSE      
npm notice 6.7kB dist/index.js
npm notice 1.6kB package.json 
npm notice 3.4kB README.md    
npm notice === Tarball Details === 
npm notice name:          @thrash-industries/react-actioncable-provider
npm notice version:       3.0.0                                        
npm notice package size:  4.3 kB                                       
npm notice unpacked size: 12.8 kB                                      
npm notice shasum:        250face9cbc33a07b8db26d3891907606b99f3be     
npm notice integrity:     sha512-CAkR2Hy1CclQm[...]OO6lg44b9Cyyg==     
npm notice total files:   4                                            
npm notice 
+ @thrash-industries/react-actioncable-provider@3.0.0