feat: Added price (amount and currency) | Code commented and styled

[Shivam010]

Price added | Comments added | Code Documented and styled according to GoLang Wiki: https://github.com/golang/go/wiki/CodeReviewComments

1. price.go

• Prices are often used with Currency Codes and hence, one can use the price tags to have mock prices

2. helpers.go

• SliceIntToString -> IntToString

3. faker.go

• tags string name changed
• DAY_OF_MONTH -> DayOfMonthTag
• TIME_PERIOD -> TimePeriodTag

4. internet.go

• https(secure) urlFormats added
• Url -> Url
• Ipv4 -> Ipv4
• Ipv6 -> Ipv6

5. lorem.go

• Sentences -> Paragraph
• Sentence now, directly ends with a full stop, not a space followed by full stop.
• A randomized Paragraph is generated having lines <= 10

6. person.go

• New Titles added
• Male names starting with 'Y' and Female names starting with 'X' are added

[codecov]

Codecov Report

Merging #37 into master will increase coverage by 0.14%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #37      +/-   ##
==========================================
+ Coverage   97.88%   98.02%   +0.14%     
==========================================
  Files           8        9       +1     
  Lines         378      406      +28     
==========================================
+ Hits          370      398      +28     
  Misses          4        4              
  Partials        4        4

Impacted Files	Coverage Δ
datetime.go	100% <ø> (ø)	⬆️
payment.go	100% <ø> (ø)	⬆️
address.go	100% <ø> (ø)	⬆️
faker.go	95.45% <ø> (ø)	⬆️
phone.go	100% <100%> (ø)	⬆️
price.go	100% <100%> (ø)
person.go	100% <100%> (ø)	⬆️
internet.go	100% <100%> (ø)	⬆️
lorem.go	100% <100%> (ø)	⬆️

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[bxcodec]

Very Cool.
Thank you very much for this PR.
Looks good to me. 👍