Added Announcement

[krischoi07]

Added copy to Announcements. Fixes #91

Fixes

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added in line documentation to the code I modified

Short description of what this PR does:

If you have questions, please send an email to Sendgrid, or file a Github Issue in this repository.

[SendGridDX]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #92 into master will increase coverage by 0.12%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #92      +/-   ##
==========================================
+ Coverage   99.32%   99.45%   +0.12%     
==========================================
  Files           2        2              
  Lines         149      182      +33     
==========================================
+ Hits          148      181      +33     
  Misses          1        1

Impacted Files	Coverage Δ
test/__init__.py	100% <0%> (ø)	⬆️
smtpapi/__init__.py	99% <0%> (+0.29%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 97cca34...b2affcb. Read the comment docs.