Feature request: renv::status() - report upgraded vs. downgraded packages more clearly

[HenningLorenzen-ext-bayer]

I would like to see more clearly whether packages (installed in the library) have been upgraded or downgraded relative to the lockfile specification.

Doing the math on version numbers myself is cumbersome, I would like renv to do this for me.

Example from renv 1.0.11

# CRAN -----------------------------------------------------------------------
- cluster       [2.0.8 != 2.1.0]
- ellipsis      [0.3.0 != 0.3.1]
- foreign       [0.8-71 != 0.8-75]
- git2r         [0.26.1 != 0.27.1]
- haven         [2.2.0 != 2.3.1]
- jsonlite      [1.6.1 != 1.7.0]
- KernSmooth    [2.23-18 != 2.23-16]
- lubridate     [1.7.8 != 1.7.9]
- MASS          [7.3-51.4 != 7.3-51.5]
- Matrix        [1.2-17 != 1.2-18]
- matrixStats   [0.58.0 != 0.56.0]
- mgcv          [1.8-28 != 1.8-31]
- nlme          [3.1-139 != 3.1-144]
- nloptr        [1.2.1 != 1.2.2.1]
- openssl       [1.4.1 != 1.4.2]
- pkgbuild      [1.0.7 != 1.0.8]
- ps            [1.3.2 != 1.3.3]
- renv          [0.13.2 != 1.0.11]
- sp            [1.4-5 != 1.4-2]
- survival      [3.1-12 != 3.1-8]
- zip           [2.1.1 != 2.2.0]

Mock-up 1: Replace != with relational operators

# CRAN -----------------------------------------------------------------------
- cluster       [2.0.8 < 2.1.0]
- ellipsis      [0.3.0 < 0.3.1]
- foreign       [0.8-71 < 0.8-75]
- git2r         [0.26.1 < 0.27.1]
- haven         [2.2.0 < 2.3.1]
- jsonlite      [1.6.1 < 1.7.0]
- KernSmooth    [2.23-18 > 2.23-16]
- lubridate     [1.7.8 < 1.7.9]
- MASS          [7.3-51.4 < 7.3-51.5]
- Matrix        [1.2-17 < 1.2-18]
- matrixStats   [0.58.0 > 0.56.0]
- mgcv          [1.8-28 < 1.8-31]
- nlme          [3.1-139 < 3.1-144]
- nloptr        [1.2.1 < 1.2.2.1]
- openssl       [1.4.1 < 1.4.2]
- pkgbuild      [1.0.7 < 1.0.8]
- ps            [1.3.2 < 1.3.3]
- renv          [0.13.2 < 1.0.11]
- sp            [1.4-5 > 1.4-2]
- survival      [3.1-12 > 3.1-8]
- zip           [2.1.1 < 2.2.0]

Mock-up 2: group downgraded vs. upgraded

# CRAN -----------------------------------------------------------------------
## Library packages have been upgraded ---------------------------------------
- cluster       [2.0.8 < 2.1.0]
- ellipsis      [0.3.0 < 0.3.1]
- foreign       [0.8-71 < 0.8-75]
- git2r         [0.26.1 < 0.27.1]
- haven         [2.2.0 < 2.3.1]
- jsonlite      [1.6.1 < 1.7.0]
- lubridate     [1.7.8 < 1.7.9]
- MASS          [7.3-51.4 < 7.3-51.5]
- Matrix        [1.2-17 < 1.2-18]
- mgcv          [1.8-28 < 1.8-31]
- nlme          [3.1-139 < 3.1-144]
- nloptr        [1.2.1 < 1.2.2.1]
- openssl       [1.4.1 < 1.4.2]
- pkgbuild      [1.0.7 < 1.0.8]
- ps            [1.3.2 < 1.3.3]
- renv          [0.13.2 < 1.0.11]
- zip           [2.1.1 < 2.2.0]
## Library packages have been downgraded -------------------------------------
- KernSmooth    [2.23-18 > 2.23-16]
- matrixStats   [0.58.0 > 0.56.0]
- sp            [1.4-5 > 1.4-2]
- survival      [3.1-12 > 3.1-8]