Add wildcard parameterized type

[yhtMinceraft1010X]

Part of #122

Proposed commit message:

The assertParseSuccess and assertParseFailure parameter parser
uses raw type for Parser. This would give a warning under to 
javac -Xlint:rawtypes.

Let's add a wildcard type parameter to Parser.

[canihasreview[bot]]

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[canihasreview[bot]]

v1

@yhtMinceraft1010X submitted v1 for review.

• [v1 1/1] Add wildcard parameterized type

(:books: Archive)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/121/1/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

Thanks very much for the PR @yhtMinceraft1010X @se-edu/tech-team-level1 for your review please ...

[jayasting98]

That seems to remove that warning. This change seems fine to me.

[damithc]

Thanks all for the reviews. @yhtMinceraft1010X perhaps we can omit Intellij from the commit message? Rationale: as this a improvement to the code, we should be able to justify it without relying on an IDE warning. Don't forget to wrap the body at 70 chars, not 50 chars.

[yhtMinceraft1010X]

Thanks Prof! I have fixed the commit message

[canihasreview[bot]]

v2

@yhtMinceraft1010X submitted v2 for review.

• [v2 1/1] Add wildcard parameterized type

(:books: Archive) (:chart_with_upwards_trend: Interdiff between v1 and v2) (:chart_with_upwards_trend: Range-Diff between v1 and v2)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/121/2/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[damithc]

Thanks for the fix @yhtMinceraft1010X Note that I revised the commit message a bit when merging.